Math Unit 2 Skills Name ___________________________________ Student # _____ (multiplication) My Knowledge Key: Skill 4 – I could teach this to the class 3 – I understand this, but made some careless errors 2 – I’m starting to understand, but still get confused 1 – I don’t understand this at all My Knowledge A Sample Problem Draw base ten blocks to show: 7 x 10= I can represent multiplication problems using base ten blocks. I can use arrays to multiply by 10 and 100 4 3 2 1 3 X 100= 4 3 2 1 Write a multiplication number sentence that you could use to represent this illustration. _______________________________________ Write an addition number sentence that you could use to represent this illustration. ______________________________________ Solve the following: I can multiply by multiples of 10 and 100 I know that multiplication is the same as repeated addition I can solve single step multiplication word problems I can use rounding to estimate products. 4x8= 4x5= 4 x 80 = 4 x 50 = 4 x 800 = 4 x 500 = 4 3 2 1 Write the multiplication equation that represents each expression below: 4 3 2 1 2+2+2+2 ____________________ 9+9+9 ____________________ Mrs. Darnley bought 9 boxes of suckers. Each box contained 60 suckers. How many suckers did she buy? 4 3 2 1 4 3 2 1 Justin receives $36 a month for shoveling driveways. Write an equation you could use to estimate how much money he would earn in 9 months. ________________________________ I can use estimation to decide if the answer to a problem is reasonable 4 3 2 1 Jill and Linda are making gingerbread houses for a good citizens project at school. If they can make 23 houses per day. Jill says that they will have 200 gingerbread houses at the end of the week. Is Jill’s statement reasonable? Explain. Use partial products to multiply: 56 x 3 = ________ I can use partial products to multiply 2-digit, 3-digit & 4-digit numbers by 1-digit numbers 498 x 5 = ________ 4 3 2 1 3,187 x 6 = ________ 24 x 35 = ________ I can use partial products to multiply 2-digit numbers by 2-digit numbers 4 3 2 1 I understand how to use the distributive property 4 3 2 1 (5 x 4) + ( 5 x 5) = 5 x _____ 7 x 82 = I can use the distributive property to multiply a 1-digit number by a 2-digit number _______ x _______ = __________ 4 3 2 1 _______ x _______ = __________ _________ + _________ = __________ Show how you can use the distributive property to find 742 x 6 = I can use the distributive property to multiply a 1-digit number by a 3-digit number 6 x 742 4 3 2 1 ( ____ x ____ ) + ( ____ x ____) ( ____ x ____ ) ( ______ ) + ( ______ ) + ( ________) ________________ I can multiply 2, 3, and 4-digit numbers by 1- digit numbers using the traditional method of multiplication I can use the traditional alogorithm to multiply 2-digit numbers by 2digit numbers Identify the information needed to solve a word problem and eliminate information that is not needed 4 3 2 1 74 x 6 x 468 x 7 24 36 x 5,678 x 9 94 51 4 3 2 1 4 3 2 1 In order to raise money for Food Pantry, Gloria plans to sell bags of popcorn after the chorus concert. A ticket to the concert costs $1. She will pop 150 bags of popcorn. There will be 200 pieces of popcorn in each bag. She hopes that at least 500 people will attend the chorus concert. She plans to sell the popcorn for $2 per bag. If she sells all of the popcorn, how much money will Gloria raise for the Food Pantry? Hint: remember CUBES! Sarah plans on reading 30 pages per day in her book. If she reads 7 days per week for 4 weeks, how many pages will Sarah read all together? Solve multi-step word problems I can use compensation to multiply mentally. 4 3 2 1 Alex drove his motorcycle 807 miles each month for 4 months. How many miles did he ride in all? (hint: estimate, multiply, adjust) 4 3 2 1 Write an expression that could be used to check each of the following equations below. I know that division is the inverse property of multiplication. 4 3 2 1 30 ÷ 5 = 6 ________________ 72 ÷ 8 = 9 ________________