5 Mathematics Quarter 1 – Module 6: Multiplication of Fractions Mathematics Alternative Delivery Mode Quarter 1 – Module 6: Multiplication of Fractions First Edition, 2020 Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties. Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them. Published by the Department of Education – Schools Division Office of Quezon City Local Government of Quezon City Schools Division Superintendent Dr. Jenilyn Rose B. Corpuz City Mayor Hon. Ma. Josefina Belmonte Alimurung Development Team of the Module Writers: MARY ROSE V. MARZADO, FELIPA C. BASSIG Editors: Elena L. Landicho; Dr. Rosalito R. De Roda, Onourich T. De Lara, Cynthia G. Gomez Reviewers: Ma. Corazon Silvestre, Joel P. Feliciano, Ma. Nimfa R. Gabertan Illustrator: Leilanie S. Yutiampo, Joey M. Dela Cruz Layout Artist: Management Team: Jenilyn Rose B. Corpuz, CESO VI, SDS Fredie V. Avendaño, ASDS Ebenezer A. Beloy, OIC-CID Heidee F. Ferrer, EPS – LRMS Joel Feliciano, EPS – Mathematics Printed in the Philippines by the Schools Division Office of Quezon City Department of Education – National Capital Region Office Address: Telephone No: Telefax: E-mail Address: Schools Division Office – Quezon City 8352 – 6806 / 6809 3456 - 0343 sdoqcactioncenter@gmail.com 5 Mathematics Quarter 1 – Module 6: Multiplication of Fractions Introductory Message For the facilitator: Welcome to the Mathematics 5 Multiplication of Fractions! Alternative Delivery Mode (ADM) Module on This module was collaboratively designed, developed and reviewed by educators both from public and private institutions to assist you, the teacher or facilitator in helping the learners meet the standards set by the K to 12 Curriculum while overcoming their personal, social, and economic constraints in schooling. This learning resource hopes to engage the learners into guided and independent learning activities at their own pace and time. Furthermore, this also aims to help learners acquire the needed 21st century skills while taking into consideration their needs and circumstances. In addition to the material in the main text, you will also see this box in the body of the module: Notes to the Teacher This contains helpful tips or strategies that will help you in guiding the learners. As a facilitator you are expected to orient the learners on how to use this module. You also need to keep track of the learners' progress while allowing them to manage their own learning. Furthermore, you are expected to encourage and assist the learners as they do the tasks included in the module. 2 For the learner: Welcome to the Mathematics 5 Alternative Delivery Mode (ADM) Module on Multiplication of Fractions! This module was designed to provide you with fun and meaningful opportunities for guided and independent learning at your own pace and time. You will be enabled to process the contents of the learning resource while being an active learner. This module has the following parts and corresponding icons: What I Need to Know This will give you an idea of the skills or competencies you are expected to learn in the module. What I Know This part includes an activity that aims to check what you already know about the lesson to take. If you get all the answers correct (100%), you may decide to skip this module. What’s In This is a brief drill or review to help you link the current lesson with the previous one. What’s New In this portion, the new lesson will be introduced to you in various ways; a story, a song, a poem, a problem opener, an activity or a situation. What is It This section provides a brief discussion of the lesson. This aims to help you discover and understand new concepts and skills. What’s More This comprises activities for independent practice to solidify your understanding and skills of the topic. You may check the answers to the exercises using the Answer Key at the end of the module. What I Have Learned This includes questions or blank sentence/paragraph to be filled in to process what you learned from the lesson. What I Can Do This section provides an activity which will help you transfer your new knowledge or skill into real life situations or concerns. Assessment This is a task which aims to evaluate your level of mastery in achieving the learning competency. 3 Additional Activities In this portion, another activity will be given to you to enrich your knowledge or skill of the lesson learned. Answer Key This contains answers to all activities in the module. At the end of this module, you will also find: References This is a list of all sources used in developing this module. The following are some reminders in using this module: 1. Use the module with care. Do not put unnecessary mark/s on any part of the module. Use a separate sheet of paper in answering the exercises. 2. Don’t forget to answer What I Know before moving on to the other activities included in the module. 3. Read the instruction carefully before doing each task. 4. Observe honesty and integrity in doing the tasks and checking your answers. 5. Finish the task at hand before proceeding to the next. 6. Return this module to your teacher/facilitator once you are through with it. If you encounter any difficulty in answering the tasks in this module, do not hesitate to consult your teacher or facilitator. Always bear in mind that you are not alone. We hope that through this material, you will experience meaningful learning and gain deep understanding of the relevant competencies. You can do it! 4 What I Need to Know This module was designed and written with you in mind. It is here to help you master multiplication of fractions. The scope of this module permits it to be used in many different learning situations. The language used recognizes the diverse vocabulary level of students. The lessons are arranged to follow the standard sequence of the course. But the order in which you read them can be changed to correspond with the textbook you are now using. The module is divided into three lessons, namely: Lesson 1 – Visualizing Multiplication of Fractions Using Models Lesson 2 – Multiplying a Fraction and a Whole Number and Another Fraction Lesson 3 – Multiplying Mentally Proper Fractions with Denominators up to 10 After going through this module, you are expected to: 1. visualize multiplication of fractions using models 2. multiply a fraction and a whole number and another fraction 3. multiply mentally proper fractions with denominators up to 10 What I Know Choose the letter of the best answer. Write the chosen letter on the blank before each number. _____1.) Which shows the visualization of the product A. x x ? B. C. D. x x x x x x x x x 5 x _____2.) Which visualization gives the product of x x x x x A. x x x B. ______3. ) x 10 = _______ _____4. ) x A. x C. D. B. C. D. 3 B. C. D. _____5.) What is the product when we multiply A. 13 _____6.) What is x A. by 16? B. 14 C. 15 D. 16 B. C. D. ? _____7.) The product of x A. B. is _____________. C. D. x 10 will give you a product of ___________. A. 5 _____9.) x = ________ A. _____8.) ? x B. x A. C. 15 D. 20 C. D. = _______ A. _____10.) B. 10 will give you a product of ____________. B. C. 6 D. Lesson 1 Visualizing Multiplication of Fractions Hey kids! After learning addition and subtraction of fractions, this week we are going to learn about multiplication of fractions. In this module, you will learn how to visualize multiplication of fractions using models or illustrations. So, let’s get it on! What’s In Write the fraction for the shaded parts of the whole. 1. ____________________ 3._________________ 2. ______________________________ 4. _________________________ 5. __________________ Notes to the Teacher As teachers, we need to teach fractions by using concrete materials, illustrations and models for our pupils to visualize how a whole is divided into parts. In this way, they can easily add, subtract, multiply and divide fractions. Moreover, they can master the lessons on fractions by providing them various and differentiated activities. 7 What’s New A face mask nowadays is very important because of the pandemic. So, don’t forget to wear your face mask if you are with other people and when you go out. In order to be safe, stay at home and enjoy our lesson! Let’s read and analyze our story problem. Rosemel had meter of white cloth. She used of it to make her face mask. What fractional part of the white cloth did she use? Let’s help Rosemel find out the fractional part of the white cloth she used for her face mask! What is It Analysis of the Problem 1. Understand What is asked? Fractional part of the white cloth she used for making her face mask What are given? = meter of white cloth = fractional part of the white cloth she used for making her face mask 2. Plan Find the fractional part of the white cloth she used for making her face mask. > We can use illustration or unit. What operation to use? Multiplication What is the number sentence? x 8 =N 3. Solve a. Visualization Let’s say that the rectangle below represents 1 meter of cloth and it is divided into 9. The shaded part represents Rosemel’s cloth which is meter. (Model A) Model A Then divide the shaded part into three. (Model B) Model B Color 1 of the 3 shaded parts to get and put X mark. of Final Output X meter of the white cloth b. Computation x 4. Answer: = Multiply first the numerators. Multiply the denominators. meter of cloth was used by Rosemel in making her face mask. Let’s have more activities for you to visualize multiplication of fractions. 9 1. Get a piece of paper. Fold it horizontally into 2 and color . Then fold the paper vertically into 4 and color using the colored part of the first fraction and put X mark. Open the folded paper for you to see the final output. a. Visualization Model A X Model B Final Output = X b. Computation: x X = of it to your 2. If the Barangay gave you 6 kilograms of rice and you shared best friend. What fractional part did you give to your best friend? a. Visualization Each box contains 1 kilo of rice. Model A 1 Kilo 1 Kilo 1 Kilo 1 Kilo 1 Kilo 1 Kilo 1 1 You get ½ kilo from each box for your best friend. Model B 1 1 2 2 1 1 2 2 2 2 Now, let’s combine all his share in one container for us to see the fractional part you had given him. Final Output 2 1 1 Kilo 2 b. Computation 2 1 Kilo 2 3 of 6 = 1 x 6 = 1x 6 = 6 = 3 kilos of rice 2 2x1 2 1 10 2 1 1 Kilo 2 3. If your brother had 9 marbles and he gave you you get? of it. How many marbles will a. Visualization We group the 9 marbles into 3 because we need to find group will be given to you so you will get 3. of it. The first b. Computation: 3 of 9 = x 9 = 9 = 9 marbles ÷ 3 groups = 3 marbles per group 3 1 Answer: 3 marbles will be given to you. 4. Mother bought 4 donuts. She gave you of it. How many donuts will you receive? a. Visualization To find of the 4 donuts, we need to group the donuts into 2 based on the denominator of . The first group of donuts will be given to you. Therefore, you will receive 2 donuts. b. Computation: of 4 = 1 x 4 = 4 donuts ÷ 2 groups = 2 donuts per group 11 Here are some ways to visualize multiplication of fractions: 1. You may use models or illustrations or grids and color the part that represents the first fraction (Model A). Then color the part that represents the 2nd fraction in the problem (Model B) and put X mark to see the final output. 2. You may also use a piece of paper. Fold the paper horizontally (pahiga) using the denominator of the first fraction and color the part that represents it (Model A). Then fold the paper vertically (patayo) using the denominator of the second fraction then color the part that represents it and put X mark (Model B). Open the folded paper for you to see the final output. 3. In visualizing the fractional part of a whole, we use model A to show the given item then we use model B as the fractional part. Finally, we combine all the fractional parts in model B for the final output. 4. To visualize the fractional part of objects, we group them according to the denominator of the given fraction then we box the group based from the numerator of the fraction. Key Ideas to Remember in Multiplication of Fractions In multiplying fractions, multiply first the numerators then multiply the denominators. Common factors appearing in the numerator and denominator can be cancelled. Get the lowest term when possible. In finding the fractional part of a whole number, we write 1 as the denominator of the whole number. Then, we multiply the numerators and the denominators. Another way is to multiply the numerators then divide its product with the denominator. Ex. ¼ of 24 = 1 x 24 = 6 4 12 What’s More Activity 1.1: Color Time Color the final output of each visualization. Then write the multiplication equation. 1.) _____ 4.) x _____ = ____ _____ x 5.) 2.) ______ x _____ = ______ ____ 3.) _____ x _____ = _______ Activity 1.2: Combining Fractional Parts Find the fractional part of a whole: 1.) _____ = ____ x 4 = ______ 13 x ____ = ____ 2.) x 5 = _______ 3.) x 2 = ______ Activity 1.3: Analyze and Solve using Illustration If you have of a whole pizza and you gave of it to your friend. What fractional part of your pizza did you give to her? Illustrate it using the circle below. Then write your answer on the blank. _________ Activity 1.4: Drawing Time Illustrate and find the product. 1.) x = __________ 2.) x = __________ 3.) x = __________ 4.) x8 = __________ 5.) x3 = __________ 14 What I Have Learned What have you learned about visualization of multiplication of fractions? What do we use to visualize multiplication of fractions? For visualization of each fraction equation, we can use _____________, _______________, and ________________. What I Can Do Analyze and solve the problem. Romel has meter of transparent acetate sheet. He used of it in making his “Do It Yourself” face shield for his protection. What fractional part of the transparent acetate sheet did he use in making his face shield? Assessment Choose the best answer. Write the letter of your answer on the blank before each number. _____1. What is x =_____ A. B. C. D. X X X X X X X X 15 X X ______2. What fraction does this final output represent? X B. A. C. D. ______3. What is the correct multiplication equation for this visualization? x x x A. x =N B. x =N C. x =N D. x ______4. What is the correct visualization for the product of B. C. D. X X X X A. B. x x x x x 3 = N? C. x x =N = N? A. _____5. Which is the correct visualization for x x x D. x x ______6. What is the product of the equation in number 5? A. B. C. 16 D. x ______7. Which of the following visualizations shows the product of A. B. X C. X D. X X ______8. Which of the following visualizations gives the product of A. B. x C. x x x x 4? D. x x ______9. The product of A. x B. x 5 is ____________. x C. x x D. x x x x x x 17 ? _____10. If you had 4 apples and you gave of them to your mother, how many apples did she receive? Which of the following visualizations shows the correct answer for the problem? A. B. C. D. Additional Activities Illustrate and give the product 1. x = _______________ 2. x = _______________ 3. x = _______________ 4. x 10 = _______________ 5. x6 = ______________ 18 Lesson 2 Multiplying a Fraction and a Whole Number and Another Fraction Hi Kids! You have learned the visualization of fractions in Lesson 1 of this module. This time, you will learn about multiplying a fraction and a whole number and another fraction. So, come on let’s learn about this. What’s In A. Choose the letter of the correct answer. _____1. What fraction does this final output represent? X X B. 𝐴. C. D. _____2. What is the correct multiplication equation for this visualization? x x x x A. x =N B. x x =N C. X =N _____3. Which of the following visualizations shows A. X B. X X D. x ? C. D. X X X X X X X 19 X =N _____4. Which of the following visualizations gives the product of A. x B. x C. x x x x _____5. What is of 6? A. B. C. D. 20 D. x 5? What’s New Story Problem Ana helped her mother prepare their family breakfast. She prepared Spanish chocolate drinks by boiling of the 5 liters of fresh milk with liters of native chocolate with coco sugar. How many liters of ingredients did she use in all? What is It Analysis of the Problem: 1. Understand: Asked: Fractional part of liters of milk was used. Given: = fractional part of the fresh milk that Ana used 5 = liters of fresh milk 2. Find: What operation to use? Multiplication What is the number sentence? 3. Solve: x5=N of 5 liters pack of fresh milk 1 3 x 5 = 3 liters 5 1 4. Answer: 3 liters of 5 liters of fresh milk was used. 21 Let’s have more activities for you to understand multiplication of fractions. 1. Romar received of a banana cake. He ate of the banana cake did he eat? x Step 1 of it. What fractional part =N Multiply the numerators, 3 x 1 = 3. Step 2 Multiply the denominators, 4 x 3 = 12. Step 3 Reduce the product in lowest term, x = = 3÷3 = 12 ÷ 3 Get the GCF of the numerator and denominator and use it to divide them. 3= 3x1 12 = 3 x 4 GCF = 3 Answer : Romar ate 2. Find the product of Step 1 of the banana cake. x = N. Check which of the numerators and denominators have the same factors so that we can cancel them. 1 3=3x1 9=3x3 x = 3 GCF =3 Step 2 Multiply the numerators and the denominators. 1x1 = 1 4x3 12 Answer : Remember: In multiplying fractions, we multiply first the numerators then we multiply the denominators. We simplify if necessary. We can also use the cancellation method for us to simplify the fractions before multiplying. 22 What’s More Activity 1.1 Find the product. Cancel the common factors if possible. Express all answers in simplest forms. 1. x = 3 x 5 = _____ 8x6 2. 18 x = 18 x 9 = _____ 9 3. x = 7x3 9 x 28 4. 35 x 5. x Activity 1.2 = _____ = 35 x 5 =_____ 7 = 5 x 9__ = _____ 12 x 10 Encircle the correct product. 1.) 35 of =N ( 28 15 21 ) 2.) 42 of =N ( 30 35 45 ) of 18 = N ( 2 3 4) 4.) of 28 = N ( 15 21 12 ) 5.) ( 15 21 30 ) 3.) of 35 = N 23 Activity 1.3 Match column A with column B. Write the letter of the correct answer on the blank before each number. A B _____1. x 20 = N A. _____2. x B. _____3. x 36 = N C. 16 _____4. x =N D. _____5. x =N E. F. 20 =N What I Have Learned What did you learn today? How do we multiply fractions? In multiplying fractions, we multiply first the _______ then we multiply the ___________. We simplify if necessary. We can also use the ____________ for us to simplify the fractions before multiplying. What I Can Do Solve each problem. Express all the answers in simplest forms. 1. A box has twenty-seven toys. If of the toys are for girls, how many toys are for girls? 2. A can of corned beef weighed 500 grams. If of the can was served at breakfast, how many grams were served? 3. Grace used of pad paper with 100 sheets. How many sheets of pad paper were used? 24 of a class of grade 5 joined the Math Club. If there are 40 pupils 4. in the class, how many joined the Math Club? 5. A leaking faucet wastes liters of water per hour. How many liters of water are wasted in a day? Assessment Find the product of the following fractions and whole numbers. Write the letter of the best answer on the blank before each number. _____1.) of 6 = _________ A. 2 _____2.) B. 3 of C. D. C. 8 D. 9 C. D. C. D. C. 18 D. 19 C. D. of 10 = ________ _______3. ) A. 6 ______4. ) x _____5.) x B. 7 = _______ B. A. A. = ________ B. ______6. ) of 20= _______ ______7. ) x A. 16 A. D. 5 = _________ B. A. C. 4 B. 17 = _______ B. 25 x 36 = ______ ______8. ) A. 5 x _____9. ) B. 10 C. 15 D. 20 B. C. D. 1 C. D. = ______ A. _____10.) x = ________ A. B. Additional Activities Multiply and express the product in simplest form if possible. x = _________ 2. x3x = _________ 3. x 5 = _________ 4. x 2 = ________ 1. 1 x = _________ 5. 3 x 6. x = _________ 7. x = __________ 8. x = ___________ 9. x 5 = ___________ 10. x = ___________ 26 Multiplying a Fraction and a Whole Number and Another Fraction Lesson 3 Hello Kids! We are now on our third lesson on multiplication of fractions. Today, you are going to learn how to multiply fractions mentally. Are you ready? What’s In A. Give the product of the following numbers. 1.) 6 x 2 = _____ 2.) 7 x 4 = ______ 3.) 8 x 5 = ______ 4.) 9 x 6 = ______ 5.) 10 x 7 = ______ B. Multiply the following fractions. 6.) x = ______ 7.) x = ______ 8.) x = _______ 9.) x = _______ 10.) x = ________ What’s New Story Problem: Lea had kilograms of cheese. She used of the cheese for baked macaroni. How many kilograms of cheese were used? 27 What is It Let us analyze the word problem: 1. Understand: kg of cheese Given: part of the cheese she used for the baked macaroni Asked: kg. of cheese used for the baked macaroni 2. Find: What operation to use? Multiplication x What is the number sentence? =N 3. Solve: 1 x 3 = 1 kg of cheese was used 3 4 4 4. Answer: kg. of cheese was used for the baked macaroni. Let’s have another activity: x =N Step 1 Multiply the numerators, Step 2 Multiply the denominators, 4 x 2 = 8. 1 x 1 = 1. Answer: To multiply fractions mentally, multiply the numerators and the denominators separately. 28 What’s More Activity 1.1 Find the product of the following fractions by using cancelation. 1.) x = ______ 2.) x = _______ 3.) x = _______ 4.) x = ________ 5.) x = ________ Activity 1.2 Multiply the following fractions. Express the product in lowest terms. 1.) x = ______ 2.) x = ______ 3.) x = _______ 4.) x = _______ 5.) x = _______ Activity 1.3 Find the product of the following fractions orally. x 1. B. A. 2. x x A. 10 C. D. C. D. C. D. = _________ B. A. 3. = _________ = _______ B. 29 x 4. A. 5. 20 x = _______ B. C. D. C. D. = ________ A. B. Activity 1.4 Multiply the following factions orally. Match column A with column B. Write the letter of the correct answer on the space provided. A B _____1. x =N A. _____2. x =N B. _____3. x =N C. _____4. x =N D. _____5. x =N E. F. What I Have Learned How do we multiply fractions mentally with denominators up to 10? To multiply fractions mentally, multiply the ___________ and the ______________ separately. 30 What I Can Do Read and solve the problem. Reduce the answers to simplest form. kg. of mango. She gave 1. Maresfel had of it to her friend. What part of the mango was given to her friend? 2. Jhia consumed of her milk. She had can of milk. What part of her milk was consumed? 1 3. Nicole ate 2 of her food. She had box of food. What part of the food did she eat? Assessment Find the product of the following fractions. Write the letter of the best answer on the blank before each number. x = ______ A. B. x = ______ _____ 1.) _____ 2.) B. A. _____3.) x x A. D. C. D. = _______ A. _____4.) C. B. C. D. = ______ B. C. 31 D. x _____5.) = ______ A. B. x = _________ A. B. _____ 6.) C. D. C. D. C. D. 4 ____ 7.) A. _____ 8.) x 5 = _________ B. x = _____ A. _____9.) x C. D. B. C. D. B. C. D. = ______ A. _____10.) B. x = ______ A. Additional Activities Multiply the following fractions. Write the answer on the space provided. 1.) x = ______ 2.) x = _______ 3.) x = ______ 4.) x = ______ 5.) x = ______ 32 Math 5 Q1 Module 6 Lesson 1 Answer Key What I Know 1. A 2. D 3. D 4. A 5. B 6. C 7. A 8. A 9. A 10. C What's In What’s More Activity 1.1 1. 2. 3. 4. 5. 6. 1. x = 2. x = 3. x = 4. x = 5. x = Activity 1.2 1. 2 2. 2 What’s More What I Can Do Activity 1. 3 x x = Activity 1.4 (Drawing Varies) 1. x = 2. x = 3. x = 4. x8=4 5. x3= = or Additional Activities (Drawing Varies) Assessment 1. 2. 3. 4. 5. 3. A D C D B 6. B 7. D 8. A 9. B 10. C or 33 1. 2. 3. 4. 8 5. 5 Math 5 Q1 Module 6 Lesson 2 Answer Key What’s In 1. B 2. D 3. A 4. A 5. C What's More Activity 1.1 1. 2. 10 3. 4. 25 5. 1. B 2. B 3. A 4. C 5. C 6. A 7. B 8. D 9. B 10. C 1. C 2. E 3. F 4. B 5. A What I Can Do Activity 1.2 1. 15 2. 35 3. 2 4. 12 5. 15 Assessment Activity 1.3 1. 12 toys for girls 2. 375 grams 3. 40 sheets 4. 16 pupils 5. 3 Liters Additional Activities 1. 2. 3. 3 4. 1 5. 2 6. 7. 8. 9.3 10. 34 Math 5 Module 6 Lesson 3 Answer Key What's More Activity 1.1 What’s In 2. 12 3. 28 4. 40 5. 54 6. 70 7. 1. What’s More 2. Activity 1.3 3. 1. A 2. B 3. D 4. A 5. C 4. 5. Activity 1.2 8. 1. Activity 1.4 9. 2. 10. 3. 11. 4. 1. F 2. E 3. B 4. D 5. C 5. What I Can Do 1. 2. 3. Kg of mango can of her milk of the box of food Assessment 1. A 2. C 3. A 4. B 5. A 6. A 7. B 8. D 9. A 10. C Additional Activities 1. 2. 3. 4. 5. 35 References De Leon, Irminda (2017), et al, Math in a Challenging World 5. Instructional Coverage System Publishing, Inc. pp.220 Most Essential Learning Competency Grade 5 Ecaldre, Felix G. (2004) . Skillbuilders in Math 5. Book Craft Publishing Co., Inc. pp. 81 – 86 Ursua, Alvin C.,et al. (2016) . 21st Century Mathletes 5. Vibal Group, Inc. pp. 78-83 Villamayor, Adela C., et. Al. (2016) Math for Life 5. Rex Publishing For inquiries or feedback, please write or call: Department of Education – Schools Division Office of Quezon City Nueva Ecija St., Bago, Bantay, Quezon City Telephone: 8352 – 6806/ 8352 - 6809 Email Address: sqoqcactioncenter@gmail.com 36