ITM 3/3 WS Name: Introduction to Multiplication Date: Seriously Addictive Maths Time:

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1 Time: 1. 4 cans of soft drinks are packed into a carton. How many cans of soft drinks are there in 6 such cartons 4 The number of cans is the same for each carton. No of cans of soft drinks in 6 cartons 6 x 4 = 24 There are 24 cans of soft drinks in 6 cartons. Copyright. All Rights Reserved. Page 1

2 Time: 2. Johnny likes to do paintings on glass bottles. The following diagram shows how many bottles he painted over 4 days. How many bottles did he paint altogether Day 1 Day 2 Day 3 Day 4 Hint: Johnny did not paint the same number of bottles every day. We cannot use multiplication to find the total. No of bottles painted altogether = 10 Johnny painted 10 bottles altogether. Copyright. All Rights Reserved. Page 2

3 Time: 3. There are 5 candles in a box. How many candles are there in 10 boxes altogether 5 Candles in 10 boxes 10 x 5 = 50 There are 50 candles in 10 boxes altogether. 4. Anita, Mark and Jenny went to pick flowers on a hill. Anita picked 16 flowers, Mark picked 11 and Jenny picked 9. How many flowers did they pick altogether Flowers picked altogether = 36 They picked 36 flowers altogether. Copyright. All Rights Reserved. Page 3

4 Time: 5. There are 8 tables in a restaurant. Each table has a vase with 3 roses. How many roses are there in the restaurant 3 No of roses in the restaurant 8 x 3 = 24 There are 24 roses in the restaurant. 6. Miss Lee is a music teacher. She has 8 students in each of her classes. How many students does she have if she has 5 classes 8 No of students in 5 classes 5 x 8 = 40 Miss Lee has a total of 40 students. Copyright. All Rights Reserved. Page 4

5 Time: 7. Baby Matthew needs 6 diapers a day. How many diapers does he need in 5 days No of diapers he needs in 5 days 5 x 6 = 30 Baby Matthew needs 30 diapers in 5 days. 8. Jay owns a pizza café. Refer to the table and find the total number of pizzas he sold over the 4 days. 6 Thursday Friday Saturday Sunday 5 pizzas 9 pizzas 10 pizzas 16 pizzas Total number of pizzas sold = 40 Jay sold a total of 40 pizzas over the 4 days. Copyright. All Rights Reserved. Page 5

6 Time: 9. In Jerry s wardrobe, he has 5 pairs of shorts, 4 pairs of long pants and 3 times as many shirts as pairs of long pants. How many pieces of clothing does he have in the wardrobe 4 No of shirts Jerry got 3 x 4 = 12 Pieces of clothing in the wardrobe = 21 Jerry has 21 pieces of clothing in his wardrobe. Copyright. All Rights Reserved. Page 6

7 Time: 10. Gary has 6 boxes of 4 toy trains. Henry has 7 boxes of 3 toy trains. Who has less toy trains 4 No of toy trains Gary has 6 x 4 3 = 24 No of toy trains Henry has 7 x 3 = 21 Henry has less toy trains. Copyright. All Rights Reserved. Page 7

8 Time: 11. A T-shirt costs $8 and a pair of pants costs 3 times the T-shirt. How much will 2 T- shirts and a pair of pants cost altogether $8 Cost of a pair of pants 3 x $8 $8 = $24 Cost of 2 T-shirts 2 x $8 = $16 Total cost of a pair of pants and 2 T-shirts $16 + $24 = $40 2 T-shirts and a pair of pants cost $40. Copyright. All Rights Reserved. Page 8

9 Time: 12. A table lamp weighs 5 kg. A standing fan weighs 4 kg. What is the total weight of 4 table lamps and 7 standing fans 5 kg Table lamp Total weight of 4 table lamps 4 x 5 kg = 20 kg 4 kg Standing fan Total weight of 7 standing fans 7 x 4 kg = 28 kg Total weight altogether 28 kg + 20 kg = 48 kg The total weight of 4 table lamps and 7 standing fans is 48 kg. Copyright. All Rights Reserved. Page 9

10 Time: 13. There are 6 pencils in a blue box and 8 pencils in a green box. a) How many pencils are there in 3 blue boxes 6 No of pencils in 3 blue boxes 3 x 6 = 18 There are 18 pencils in 3 blue boxes. b) How many more pencils are there in 3 green boxes than 3 blue boxes 8 3 blue boxes 3 Green boxes No of pencils in 3 green boxes 3 x 8 = 24 Difference in pencils = 6 There are 6 more pencils in 3 green boxes than 3 blue boxes. Copyright. All Rights Reserved. Page 10

11 Time: Example: Titus goes to school around 8am every morning. He needs 8 minutes to brush his teeth, 15 minutes to eat his breakfast, 8 minutes to change into his uniform and 5 minutes to put on his shoes. How much time does he need to get ready for school How much time he needs = 36 Or How much time he needs 2 x 8 = = 36 Can we use multiplication here He needs 36 minutes to get ready for school. Copyright. All Rights Reserved. Page 11

12 Time: 14. A piece of fishcake costs $1. A sausage costs $1. A pack of fried bee hoon costs $2. How much will it cost to have 5 packs of fried been hoon with a fishcake and a sausage in each pack One packet with a fishcake and a sausage $1 + $1 + $2 = $4 5 packs of fried bee hoon with a fish cake and a sausage: 4 5 packs of fried bee hoon 5 x $4 = $20 5 packs of fried bee hoon with a fish cake and a sausage in each pack will cost $20. Copyright. All Rights Reserved. Page 12

13 Time: cup of iced tea costs $2, 2 eggs cost $2 and 4 toasts cost 2 times as much as the iced tea. How much will 4 sets of 4 toasts with 1 cup of iced tea cost altogether 2 Cost of 4 toasts 2 x $2 = $4 Cost of 1 set of 4 toasts and 1 iced tea $4 + $2 $6 Cost of 4 sets 4 x $6 = $24 = $6 4 sets of 4 toasts with an iced tea cost $24. Copyright. All Rights Reserved. Page 13

14 Time: 16. Kayla collected 9 sea shells at the beach. Her brother collected 5 times as much as her. a) How many more sea shells did he collect more than Kayla 9 No of seashells Kayla s brother collected 5 x 9 = 45 Difference in seashells collected 45 9 = 36 He collected 36 sea shells more than Kayla. b) How many sea shells did they collect altogether Total seashells collected = 54 They collected 54 sea shells altogether. Copyright. All Rights Reserved. Page 14

15 Time: 17. Dan needs 4 minutes to run 1 lap around the stadium. Sharon needs thrice as long to run 1 lap. Terry needs 2 minutes less than Sharon to run 1 lap. How long will Terry need to run 7 laps Minutes taken by Sharon to run 1 lap 3 x 4 = 12 Minutes taken by Terry to run 1 lap 12 2 = Minutes taken by Terry to run 7 laps 7 x 10 = 70 Terry needs 70 minutes to run 7 laps. Copyright. All Rights Reserved. Page 15

16 Time: 18. Sandy draws 4 pictures, reads 2 books and watches 7 hours of television in a week. a) How many hours of television will she watch in 10 weeks 7 Hours of television she will watch in 10 weeks 10 x 7 = 70 Sandy watches 70 hours of television in 10 weeks. b) How many pictures will she draw in 7 weeks 4 No of pictures she will draw in 7 weeks 7 x 4 = 28 She will draw 28 pictures in 7 weeks. Copyright. All Rights Reserved. Page 16

17 Time: 19. A book is as heavy as 10 marbles. A photo album is 4 times as heavy as the book. A book and a photo album weigh as much as how many marbles 10 Book s weight in terms of marbles 10 Photo album s weight in terms of marbles 4 x 10 = 40 Book and photo album s weight in terms of marbles = 50 A book and a photo weigh as much as 50 marbles. Copyright. All Rights Reserved. Page 17

18 Time: 20. Ali bakes 5 cakes in 1 day. Fred bakes 4 less cakes than Ali in 1 day. How many cakes will Ali and Fred bake altogether in 1 week No of cakes Fred bakes in 1 day 5 4 = 1 No of cakes Fred and Ali bake in 1 day = 6 One week 7 days 6 No of cakes Fred and Ali bake in 1 week 7 x 6 = 42 Ali and Fred will bake 42 cakes altogether in 1 week. Copyright. All Rights Reserved. Page 18

19 Time: 21. Ming Hui keeps her footwear in the shoe cabinet. She has 3 pairs of slippers, 2 pairs of school shoes and 3 times as many pairs of sandals as school shoes. a) How many pairs of footwear does she have altogether Slippers School Shoes Sandals Pairs of sandals 3 x 2 = 6 Pairs of footwear = 11 She has 11 pairs of footwear altogether. b) How many more sandals does she have than slippers Difference between sandals and slippers 6 3 = 3 She has 3 more pairs of sandals more than slippers. Copyright. All Rights Reserved. Page 19

20 Time: 22. A paper clip is 2 cm. A ruler is 5 times as long as the paper clip. A table is 9 times as long as the ruler. a) How long is the table Length of ruler 5 x 2 cm = 10 cm 10cm 2 cm Length of table 9 x 10 cm = 90 cm The table is 90 cm long. Ruler Copyright. All Rights Reserved. Page 20

21 Time: b) How much longer is the table compared to the ruler Difference between table and ruler 90 cm 10 cm = 80 cm The table is 80 cm longer than the ruler. Copyright. All Rights Reserved. Page 21

22 Time: 23. May likes making paper boats. She can make 8 boats in 1 hour. a) How many boats can she make in 3 hours 8 Boats she can make in 3 hours 3 x 8 = 24 May can make 24 paper boats in 3 hours. b) How many paper boats will May have left after giving 10 of them to her friend Lily Paper boats Mary will have after giving Lily = 14 May will have 14 paper boats left. Copyright. All Rights Reserved. Page 22

23 Time: 24. A note book costs $5. An assessment book costs $3 more than the note book. A ring file costs $2 less than the note book. How much will 1 note book, 4 assessment books and 1 ring file cost Cost of assessment book $5 + $3 = $8 2 Cost of 4 assessment books 4 x $8 = $32 Cost of ring file $5 $2 = $3 Total cost of 1 note book, 4 assessment books and 1 ring file $5 + $32 + $3 = $40 1 note book, 4 assessment books and 1 ring file will cost $40. Copyright. All Rights Reserved. Page 23

24 Time: 25. Jack has 3 fish tanks. Tank A needs 8 pails of water to fill it up. Tank B needs 4 pails of water and Tank C needs twice as much pails as the number of pails needed for Tank A. a) Which tank is the largest among the 3 Tank A 8 pails of water Tank B 4 pails of water Tank C 2 x 8 pails of water = 16 pails of water Tank C is the largest among the 3 tanks. b) How much pails of water does Jack need to fill up all 3 tanks Pails of water needed to fill up all 3 tanks = 28 8 Tank C Jack needs 28 pails of water to fill up all 3 tanks. Copyright. All Rights Reserved. Page 24

25 Time: 26. Tina went shopping. A blouse costs $10. A skirt costs $2 less than the blouse and a dress costs thrice as much as a blouse. How much will it cost Tina if she buys 2 blouses, 5 skirts and 1 dress Cost of 2 blouses 2 x $10 = $ = $8 for a skirt $8 $10 Cost of 5 skirts 5 x $8 = $40 Blouse Skirts Copyright. All Rights Reserved. Page 25

26 Time: $10 Cost of 1 dress 3 x $10 = $30 Dress Cost of 2 blouses, 5 skirts and 1 dress $20 + $40 + $30 = $90 2 blouses, 5 skirts and 1 dress will cost Tina $90. Copyright. All Rights Reserved. Page 26