1 2 GET DIRECTORATE GRADE 5 MATHEMATICS CONSOLIDATION MODULE: MULTIPLICATION & DIVISION Developed by Ms J van der Merwe Metro South Education District 3 Multiplication and Division INSTRUCTIONS: 1. Do all the exercises in your classwork book showing all workings. 2. Number according to the questions per section. 3. First attempt to answer all the questions before you check answers at the end of each section. 4. Apply your knowledge to answer the questions. SECTION A: Routine Procedures: Calculate the following: Items 1. Write this number sentence in a simpler way. 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 45 3. Write the next four numbers in each sequence: (a) 25 50 75 100 125 . . . (b) 15 30 45 60 75 . . . (c) 8 16 24 32 40 . . . (d) 9 18 27 36 45 . . . (e) 7 14 21 28 35 . . . Items 2. Write this number sentence in a simpler way 20 – 2 – 2 – 2 – 2 – 2 – 2 – 2 – 2 – 2 – 2 = 0 4. Draw lines on the figure to divide it into 4 equal parts and write a number sentence that it represents. 4 5. Write a multiplication sum using the Distributive method for the array below. 6. Write a division sum for the array below. Show your clever counting 7. Refresh your multiplication memory: a. 30 x 8 = b. 50 x 6 = c. 70 x 9 = d. 90 x 4 = 9. In each case, indicate whether the statement is true or false. a. Ten hundreds are one thousand. b. Hundred hundreds are ten thousand. c. Hundred tens are one thousand. d. Two hundred fifties are ten thousand. 11. How many cubes are used to build the tower below? 8. Refresh your division memory: a. 240 ÷ 8 = b. 300 ÷ 50 = c. 630 ÷ 9 = d. 360 ÷ 90 = 10. a. How many people are ten groups of 10 people each? b. How many people are ten groups of 1 000 people each? c. How many people are ten groups of 30 people each? d. How many people are ten groups of 700 people each? 12. a. Which number divided by 10 is 150. b. Which number divided by 12 is twelve. 5 13. To multiply by 2—think double. a. 40 600 x 2 = b. 35 000 x 2 = c. 26 500 x 2 = 14. To multiply by 5—think multiply by 10 and half. Show your strategy a. 2 400 x 5 = b. 4 600 x 5 = c. 3 500 x 5 = 15. Make the sides equal. a. 150 × ____ = 1 650 b. ____ × 11 = 1 650 c. 124 × 245 = 245 × _____ d. 467 × 654 × 541 = 541 × ____ × 654 16. Use “multiplying by 1 000” and “halving” strategies to calculate: Show your strategy a. 8 × 500 = _______ b. 500 × 11 = _______ c. 500 × 18 = _______ d. 26 × 500 = _______ 17. Use “multiplying by 20” and “compensating” strategies to calculate: Show your strategy a. 3 × 21 = ______ b. 22 × 4 = ______ c. 19 × 5 = ______ d. 22 × 6 = ______ e. 19 × 9 = ______ 18. Calculate these distances: When you see this sign 19. Calculate a. 5hours 45 minutes ÷ 5 periods b. 1hr 24 min x 7 days 20. A butchery has the following notice: Sausage R13,99/kg…How much would I pay for: a. 2kg b. 10kg c. 15kg a. After 7h = b. After 10h = c. After 24h = d. After 36h = 6 A. MULTIPLICATION AND DIVISION CALCULATIONS 1. Calculate a. Two hundred and thirty multiplied by seventy-nine b. Thirteen times eight hundred and sixty-four 3. Complete the following calculation: 347 x 8 = 347 = 300 + 40 + 7 347 x 8 = 300 x 8 + 40 x 8 + x 8 = + 320 + = 2 000 + + 300 + 20 + + 6 = 2 776 2. a. Write a multiplication sum for this addition sum 3+4+3+4+3+4+3+4+3+4+3+4 b. Write a division sum for this subtraction sum 39 – 13 – 13 – 13 4. Complete the Box method of calculation: 259 x 23 = 200 4 000 4 600 + 50 150 1 150 + 180 27 207 x 20 5 180 3 + 777 5. Calculate using the Box method: 457 x 34 6. Calculate using the Box method: 963 x 89 7. If … 8. Redo the following clueboard method by filling in the missing steps: 496 ÷ 12 = a. 2 x 4 = 8…then 4 x 4 = 16…and 8 x 4 = b. 2 x 40 = 80…then 4 x 40 = 160 …and 8 x 40 = c. 20 x 40 = 800…then 40 x 40 = 1 600…and 80 x 40 = Clues Subtraction 40 x 12 = 480 496 – 480 = 1 x 12 = 16 – 12 = 4 remainder 496 ÷ 12 = 40 + 1 + remainder 4 = 41 remainder 4 9. Calculate using the Clueboard method: 793 ÷ 23 = Clueboard 1 x 12 = 12 2 x 12 = 24 3 x 12 =36 4 x 12 =48 10 x 12 = 20 x 12 = 240 30 x 12 = 40 x12 = 480 10. Calculate using the Clueboard method: 984 ÷ 42 = 7 SECTION B: ROUTINE PROBLEM SOLVING Items Items 1. An aeroplane flies at an average speed of 475 kilometres per hour. How far does it fly in 19 hours? 2. Greta sells pencils in boxes for R24 for 12 pencils or in bags for R7 for 3 pencils. Calculate the price per pencil for a box and a bag of pencils and say which is cheaper to buy. 4. I have R3 120 to spend and I want to buy 18 video games at R150 each. Do I have enough money to buy all 18? 3. Sarah has R200 to spend. If books cost R50 each, how many can she buy? 5. Ryan collected 60 football magazines in five weeks. If he collected the same amount each week, how many did he collect each week 6. There are 480 bags of apples, with sixteen apples in each. How many apples are there altogether? 7. A cross country athlete looked on his stopwatch and saw at the end of his race that he that he run the race in 273 minutes. How many hours did he take? 8. There were 1 358 people at a concert. Half of them paid R65,00 and the rest paid R75,00. How much money was collected? Round off to the nearest hundred. 9. There are 137 eggs packed in cartons. Each carton contains 12 eggs. (a) How many cartons are needed? (b) How many can be filled? (c) How many eggs are in the carton that is not filled? 10. A businessman shares R32 200. He gives his sister half and half of the rest to his brother, how much money does he have left? 11. Here is a drawing of Thandi`s mat beaded mat which she sell at the craft market. 12. In a design pattern like this, there are 720 rings arranged in rows of 24 rings each. The beads are arranged as follows: How many rows are there? 1 column of blue beads; 2 columns of yellow beads; 3 columns of green beads; 4 columns of red beads; 5 columns of pink beads; 6 columns of brown beads Now take another look at Thandi`s mat. In what ratio is each of the following? a) the number of yellow beads and the number of pink beads 8 b) c) d) e) the number of pink beads and the number of yellow beads the number of red beads and the number of brown beads the number of blue beads and the number of red beads the number of red beads and the number of blue beads 13. A box contains 144 apples and a school buys 12 boxes of apples. There are 535 14. A sheep farmer shears 250 sheep per day. How many sheep will he sheer in two learners at the school. The apples are shared equally amongst the learners. How full weeks? many apples will each learner get? 15. Farmer Smith has 600 cows. 100 cows fit into each field. 16. Lindi orders 160 flowers for table decorations. She wants to put 11 flowers in a) How many fields does Farmer Smith need? each vase. How many vases can she fill? b) Half of the cows have 2 calves each, how many cows and calves are there altogether? c) How many fields does Farmer Smith need now? 17. A mini-bus taxi owner purchased a new mini-bus and has been making monthly 18. There were two hundred and twenty-four marbles hidden at school. Sixteen children went to pick them up. The children payments to a total of R64 394. If he has been doing so over the past 11 months. collected the same number of marbles each. How many What is his monthly instalment on the new mini-bus? marbles did each child collect? 19. Alice had counted 487 legs belonging to horses on a field, what was wrong with this? How many horses were on the field if Alice was nearly right? 20. Lebogang walks about 42m per minute. (a) How far can he walk in 26 minutes? (b) How far could he walk if he walked from 10.17 am. till 11.04 am.? 9 SECTION C: Multiple Choice Items WRITE THE CORRECT LETTER NEXT TO THE NUMBER. 1. Eighteen aliens landed at the North Pole. Each alien had 3 laser cannons. How many laser canons were there altogether? 2. The factors of 36 are the numbers that when muliplied gives you the product, e.g. 3 x 12 = 36 therefore, 3 and 12 are factors. Which are all the factors of 36? A. 11 laser cannons B. 24 laser cannons C. 5 laser cannons D. 38 laser cannons A. 2, 3, 4, 6, 8, 9, 12, 14, 36 B. 1, 2, 3, 4, 6, 9, 12, 18, 36 C. 1, 2, 3, 4, 12, 18, 36 D. 1, 2, 3, 4, 6, 9, 12, 24 3. If 180 apples are arranged into equal rows of 6 apples, how many rows will there be? 4. A rubber band is 16 cm long. How long will the rubber band be when it is stretched to be 3 times as long? A. 186 rows B. 30 rows C. 3 rows D. 36 rows A. B. C. D. 48cm 36cm 19cm 64cm 5. Catherine had learnt her times table so well. She has practised a total of 525 times in 25 days. If she does the same amount daily, how many times had she practised each day? A. 25 time B. 5 times C. 10 time D. 21 times 6. A cricketer scored a average rate of 66 runs per hour. If he batted for 90 minutes, did he score more than 100 runs? 7. Shanice saved R342 in twelve months. How much had she saved each month? 8. All the learners of a primary school are going on a school outing. They are travelling on five buses: There are 76 learners on Bus A. There are 68 learners each on Buses B and C. There are 59 learners on Bus D. There are 74 learners on Bus E. When they travel back to school, the buses will all carry an equal number of learners. How many learners will there be on each bus? A. 55 learners B. 56 learners C. 96 learners A. R28 B. R28,50 C. R122 D. R358,00 A. Yes, he scored more than 100 runs B. No, he scored less than 100 runs C. He scored exactly 100 runs D. He scored half of the 100 runs 10 9. Mr Cogan and Miss Vaghela are getting married. They have invited 39 people to their wedding. Each table sits 5 people. How many tables will they need? D. 69 learners 10. A certain truck can carry 43 bags of cement. How many truckloads must be delivered if 500 bags of cement are needed at a construction site? A. 8 tables B. 7 tables C. 6 tables D. 9 tables A. 11 truckloads B. 12 truckloads C. 13 truckloads D. 14 truckloads 11. A car travelled 288 kilometres in 12 hours, how far did it travel in 1 hour? A. 24km B. 159km C. 486km D. 81km 13. 1 200 kg sugar is packed into 400 equal weight packets. How much does each packet weigh? A. 30kg B. 300g C. 8kg D. 3kg 15. Transport for 832 learners must be arranged. Two possibilities are available: Option A: Small buses that can carry 23 passengers each, at R210 for each bus. Option B: Large buses that can carry 92 passengers each, at R828 for each bus. Which option is cheaper? A. Option A B. Option B C. Both options are the same D. These no other option 12. Notebooks come in packs of 8. A school needs 1 048, one for each child. How many packs will the school need to buy? A. B. C. D. 106 packs 131 packs 8 384 packs 1 056 packs 14. What is the answer to the number sentence? (Remember to do the multiplications before doing the addition) 23 × 20 + 23 × 5 A. 2 415 B. 575 C. 4 300 D. 71 16. A baker makes 14 cakes each day. If he starts baking 14 cakes on Monday, by what day of the week will he have baked 154 cakes altogether? A. B. C. D. Sunday Saturday Friday Thursday 11 17. The grade fives are going up Table Mountain. We need to rent taxis to get to our destination. There are 115 pupils and 12 adults going. Each taxi can only hold 12 people. How many taxis does the school need to hire? 18. Each car in the parking lot has 4 wheels. There are 138 cars in the parking lot. What number sentence can be used to find the total number of wheels in the parking lot? A. 23 taxis B. 13 taxis C. 11 taxis D. 12 taxis A. B. C. D. 19. In a block of flats there are 96 families. Half of the families have 4 members in each family and the other half have 6 members. How many people live in the block? A. 960 people B. 480 people C. 384 people D. 600 people 138 + 4 138 - 4 138 x 4 138 ÷ 4 20. Ali runs 2 km in 8 minutes. Michael is twice as fast as Ali. How long does Michael take to run 10 km? A. 20min B. 60min C. 40min D. 80min 12 SECTIONA: MEMORANDUM Items 1. 9 x 5 = 45 Items 2. 20 - 20 = 0 3. (a) (b) (c) (d) (e) 4. 32 ÷ 4 = 8 150; 175; 200; 225 90; 105; 120; 135 48; 56; 64; 72 54; 63; 72;81 42; 49; 56; 63 5. (3 x 5) + (3 x 5) + (3 x 5) = 15 + 15 + 15 = 45 6. 50 ÷ 10 = 5 OR 50 ÷ 5 = 10 7. a. 30 x 8 = 240 b. 50 x 6 = 300 c. 70 x 9 = 630 d. 90 x 4 = 360 9. a. true b. true c. true d. true 11. 4 units x 3 units x 6 units = 72 units 8. a. 240 ÷ 8 = 30 b. 300 ÷ 50 = 6 c. 630 ÷ 9 = 70 d. 360 ÷ 90 = 4 10.a. 100 people b. 10 000 people c. 300 people d. 7 000 people 12. a. 1 500 b. 144 13 13. a. 40 600 x 2 = 81 000 b. 35 000 x 2 = 70 000 c. 26 500 x 2 = 53 000 14. a. 2 400 x 5 = 24 000 ÷ 2 = 12 000 b. 4 600 x 5 = 46 000 ÷ 2 = 23 000 c. 3 500 x 5 = 35 000 ÷ 2 = 17 500 15. Make the sides equal. e. 150 × _11_ = 1 650 f. _150_ × 11 = 1 650 g. 124 × 245 = 245 × _124_ h. 467 × 654 × 541 = 541 × _467_ × 654 17. f. 3 × 21 = (3 x 20) + (3 x 1) = 63 g. 22 × 4 = (20 x 4) + (2 x 4) = 88 h. 19 × 5 = (20 x 5) – (1 x 5) = 95 i. 22 × 6 = (20 x 6) + (2 x 6) = 132 j. 19 × 9 = (20 x 9) – (1 x 9) = 171 16. a. 8 × 500 = 8 000 ÷ 2 = 4 000 b. 500 × 11 = 11 000 ÷ 2 = 5 500 c. 500 × 18 = 18 000 ÷ 2 = 9 000 d. 26 × 500 = 26 000 ÷ 2 = 13 000 19. a. 1 hour 9 mins b. 9 hours 48 mins 20. a. R27,98 b. R139,90 c. R209,85 18. a. After 7h = 700km b. After 10h = 1 000km c. After 24h = 2 400km d. After 36h = 3 600km MULTIPLICATION AND DIVISION CALCULATIONS 1. a. 18 170 b. 11 232 3. Complete the following calculation: 347 x 8 = 347 = 300 + 40 + 7 347 x 8 = 300 x 8 + 40 x 8 + 7 x 8 = 2 400 + 320 + 56 = 2 000 + 400 + 300 + 20 + 50 + 6 = 2 776 2. a. 6 x 7 = 42 OR (3 x 6) + (4 x 6) = 42 OR 6 x (3+ 4) = 42 b. 39 ÷ 3 = 13 4. Complete the Box method of calculation: 259 x 23 = 5 957 200 4 000 600 4 600 + 50 1 000 150 1 150 + 9 180 27 207 x 20 5 180 3 + 777 5 957 14 5. Calculate using the Box method: 457 x 34 = 15 538 400 12 000 1 600 13 600 50 1 500 200 1 700 7 210 28 238 6. Calculate using the Box method: 963 x 89 = 85 707 X 30 4+ 13 710 1 828 15 538 7. If … d. 2 x 4 = 8…then 4 x 4 = 16…and 8 x 4 = 32 e. 2 x 40 = 80…then 4 x 40 = 160 …and 8 x 40 = 320 f. 20 x 40 = 800…then 40 x 40 = 1 600…and 80 x 40 = 3 200 900 72 000 8 100 80 100 60 4 800 540 5 340 3 240 27 267 X 80 9 Clues Subtraction 30 x 23 = 690 793 – 690 = 103 3 x 23 = 69 103 - 69 = 34 1 x 23 = 23 34 - 23 = 11 793 ÷ 23 = 30 + 3 + 1 remainder 11 = 34 remainder 11 77 040 8 667 85 707 8. Redo the following clueboard method by filling in the missing steps: 496 ÷ 12 = 41 remainder 4 Clues Subtraction 40 x 12 = 480 496 – 480 = 16 1 x 12 = 12 16 – 12 = 4 remainder 496 ÷ 12 = 40 + 1 + remainder 4 = 41 remainder 4 9. Calculate using the Clueboard method: 793 ÷ 23 = 34 remainder 11 + Clueboard 1 x 12 = 12 2 x 12 = 24 3 x 12 =36 4 x 12 =48 10 x 12 = 120 20 x 12 = 240 30 x 12 = 360 40 x12 = 480 10. Calculate using the Clueboard method: 984 ÷ 42 = 23 remainder 18 Clueboard 1 x 23 = 23 2 x 23 = 46 3 x 23 = 69 10 x 23 = 230 20 x 23 = 460 30 x 23 = 690 Clues Subtraction 20 x 42 = 840 984 – 840 = 144 2 x 42 = 84 144 – 84 = 60 1 x 42 = 42 60 – 42 = 18 Clueboard 1 x 42 = 42 2 x 42 = 84 10 x 42 = 420 20 x 42 = 840 984 ÷ 42 = 20 + 2 + 1 + remainder 18 = 23 remainder 18 15 SECTION B: ROUTINE PROBLEM SOLVING Items 1. 475 x 19 = 9 025 Km 3. R200 ÷ 50 = 4 books she can buy 5. 60 ÷ 5 = 12 collected each week 7. 273 ÷ 60 = 4h / 4h 55min 9. (a) 137 ÷ 12 = 12 cartons (b) 11 cartons (c) 7 eggs 11. a) b) c) d) e) 14 to 35 35 to 14 28 to 42 7 to 28 28 to 7 Items 2. R24 for 12 pencils and R7 for 3 pencils R7 x 4 for 12 pencils Box of 12 pencils = R24 Bag of 12 pencils = R28 Box of 12 pencils for R24 is cheaper 4. R150 x 18 = R2 700 Yes, you have enough money to buy all 18 6. 480 x 16 = 7 680 apples altogether 8. 1 358 ÷ 2 = 679 (R65,00 x 679) + (R75,00 x 679) R44 135 + R50 925 R95 060 ~ R90 100 10. R32 200 ÷ 2 = R16 100 R16 100 give to his sister R16 100 ÷ 2 = R8 050 R8 050 give to his brother R8 050 he has left 12. 720 ÷ 24 = 30 rows 13. 144 x 12 = 1 728 1 728 ÷ 535 = 3 notebooks 14. 250 x 14 = 3 500 sheep 15. a) 6 fields needed b) 1 200 cows and calves altogether c) 12 field needed 17. R64 394 ÷ 11 = R5 854 monthly instalments 16. 160 ÷ 11 = 1 760 vases 19. 487 is wrong because it is not a multiple of 4 (horses have 4 legs) Alice should have counted 488 because 488 is a multiple of 4. 20.(a) 26 x 46 = 1 092m in 26 minutes (b) 47 x 42 = 1 974m he could walk from 10:17a.m. to 11:04a.m. 18. 224 ÷ 16 = 14 marbles 16 SECTION C: Multiple Choice Items. 1. B. 54 laser cannons 2. B. 1, 2, 3, 4, 6, 9, 12, 18, 36 3. B. 4. A. 48cm 30 5. D. 21 times 6. B. No, he scored less than 100 runs 7. B. R28,50 8. D. 69 learners 9. A. 8 tables 10. B. 12 truckloads 11. A. 24km 12. B. 131 packs 13. D. 3kg 14. B. 575 15. A. Option A 16. D. Thursday 17. C. 11 taxis 18. D. 138 ÷ 4 19. B. 480 people 20. A. 20min 17