Semester 2 Review 3 (Lesson 48)

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Primary 3: Boost! Math

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Section A (10 x 2 marks)

For each question, four options are given. Choose the correct answers and write its

number (1, 2, 3 or 4) in the brackets provided.

1. In the number 7624, the digit is in the hundreds place.

()

(1) 7

(2) 2

(3) 6

(4) 4

2. Find the sum of 425 and 1798. ()

(1) 1364

(2) 1373

(3) 2214

(4) 2223

3. Complete the number pattern. ()

2130, 2110, 2120, 2100, 2110,

(1) 2080

(2) 2090

(3) 2100

(4) 2120

4. - 180 = 50 tens. ()

(1) 130 1

(2) 230

(3) 680

(4) 5180

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5. Which of the following fractions is the greatest? Primary 3: Boost! Math

(1) 3 ()

4

(2) 3

5

(3) 3

7

(4) 3

8

6. The clock shown below is 15 minutes fast. What is the actual time?

(1) 12.15 p.m. ()

(2) 12.35 p.m.

(3) 1.05 p.m.

(4) 1.15 p.m.

7. 5 strings have a total length of 2 m. What is the length of each piece of string?

(1) 4 cm ()

(2) 40 m

(3) 40 cm

(4) 400 m

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8. Chris packed some tennis balls into 7 bags. He put 6 tennis balls into each bag and

had 3 tennis balls left. How many tennis balls did he have at first?

(1) 16 ()

(2) 39

(3) 42

(4) 45

9. W h ich fraction is not equivalent to 1 ?

4

(1)

(2)

(3)

(4) ( )

10. How many 50-cent coins are needed to make up the sum of money as shown below?

(1) 10 ()

(2) 15

(3) 20 3

(4) 25

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11. The sum of the greatest possible 3-digit number and the smallest possible 4-

digit number is .

(1) 999 ()

(2) 1999

(3) 8999

(4) 9999

12. Which pair of fractions are equivalent fractions?

(1)12 , 1

4

(2) 2 , 2

3 6

(3) 1 , 2

4 8

(4) 2 , 6 ()

5 10

13. 24 x 60 = 24 x 56 + 24 x ()

(1) 1 4

(2) 2

(3) 3

(4) 4

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14. Mr Koh woke up at the time shown below.

He took 15 min to brush his teeth and wash his face. He took another 20 min to have

breakfast before he left for work.

At what time did he leave for work?

(1) 5.00 a.m. ()

(2) 5.30 a.m. ()

(3) 5.35 a.m.

(4) 5.55 a.m.

15. The side of a square is 7 cm. What is the area of the square?

(1) 7 cm2

(2) 14 cm2

(3) 28 cm2

(4) 49 cm2

16. 5 similar shelves and a coffee table cost $528.

If 3 such shelves and a coffee table cost $348, what is the cost of a shelf?

(1) $90 ()

(2) $116

(3) $180 5

(4) $876

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17. Mdm Shruti bought 4 boxes of strawberries. Each box contains 36 strawberries. She

used all the strawberries to bake 6 similar pies. How many strawberries did she use

to bake a pie?

(1) 24 ()

(2) 46

(3) 144

(4) 240

18. The number of adults at a computer fair is 4 times as many as the number of

children. There are 312 children at the computer fair.

How many more adults than children are there at the computer fair?

(1) 78 ()

(2) 234

(3) 936

(4) 1248

19. The length of a rectangle is 28 cm. ()

The length is 4 times as long as the breadth.

W hat is the perimeter of the rectangle? 6

(1) 7 cm

(2) 35 cm

(3) 70 cm

(4) 112 cm

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20. Study the balance below. Primary 3: Boost! Math

430g

790g

W hat is the mass of A? A

(1) 360 g ()

(2) 720 g

(3) 860 g

(4) 930 g

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Section B (10 x 2 marks)

Show your workings clearly and write your answers in the spaces provided. For

questions that require units, give your answers in the units stated.

21. (a) Write 8047 in words.

(b) In 6376, find the sum of the values of digits 3 and 6.

Ans:

22. Arrange the angles below from the smallest to the greatest.

a bc

Ans: , ,

23. Rosie baked some tarts. After she packed them in boxes of 6, she had 4 tarts left.

If she packed 96 boxes of tarts, how many tarts did Rosie bake?

Ans: 8

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24. The mass of Primary 3: Boost! Math

is 8 grams. What is the mass of the apple?

Ans: g

25. Janet walked from her home to the library. She spent 30 minutes at the library before

walking to the playground. She then walked home from the playground. What was

the total distance she walked?

829 m 1 km 90 m

Home Library Playground

Ans: km m

26. John had $1600.After buying a television for $899 and a washing machine, he had

$246 left. How much did the washing machine cost?

Ans: 9

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27. Sam ate 1 of a pizza.

5

Ben ate 1 of the pizza.

3

W hat fraction of the pizza was eaten?

Ans:

28. Mrs Lee baked 20 muffins. She gave away 12 muffins to her neighbours. What

fraction of muffins did she have left? Give your answer in the simplest form.

Ans:

29. A piece of flexible tube is cut into 4 pieces,A, B C and D of different lengths.

A is shorter than B. C is shorter than B but longer thanA.

D is longer than B.

Arrange the piecesA, B, C and D in order. Begin with the shortest piece.

Ans: , , , 10

shortest

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30. The picture graph below shows the number of kites 5 boys have.

Names of Number of Kites

Boys

Ali

Bill

Carl

Daniel

Each stands for 4 kites.

How many kites must Carl give to Bill so that both of them have the same number of

kites?

Ans:

31. There were 378 children in the school canteen. If there were 56 fewer boys than

girls, how many girls were there?

Ans: 11

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32. Liz has 47 stickers. Marvin has 3 times as many stickers as Liz. John has 29

stickers fewer than Marvin. How many stickers does Marvin have?

Ans :

33. I am a fraction. I am greater than 1 but smaller than 12?

4

What fraction am I? Express your answer in the simplest form.

Ans :

34. Study the diagram below. Which two lines are perpendicular to each other?

A

B

ED C

Ans:

and

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35 Arrange the fractions in order.

Begin with the greatest.

2 ,2 ,2

37 5

Ans: , ,

greatest

36 Alex and Bill each had an equal amount of money. Alex received $37 and Bill spent

$49. Alex then had $125. How much did Bill have in the end?

Ans: $

37 Mrs Lee bought 3 similar cakes and had $21 left.

If she were to buy 5 such cakes, she would be short of $15.

What is the cost of 1 such cake?

Ans: $ 13

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38. Lucas started watching a movie at 4.45 p.m. After the movie ended, Lucas took

15 minutes to walk home from the cinema. He reached home at 6.40 p.m.

W hat was the duration of the movie?

Ans : h min

39. The figure below shows a rectangular tank of capacity 120 ℓ..It is filled with 44 ℓ of

water. How many pails of capacity 4 ℓ are needed to fill the tank to the brim?

Tank Pail

Ans :

40. The length of a rectangle is twice as long as its breadth. The perimeter of the

rectangle is 48 cm. Find the area of the rectangle.

Ans: cm²

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Section C

Question 41 to 44 carry 3 marks each. Questions 45 to 46 carry 4 marks each.

Do the following sums. Show your workings clearly. For questions that require units,

give your answers in the units stated.

41. Mr Kenji bought 5 tins of paint. Each tin contains 900 ml.

He had 700 ml of paint left after painting his apartment.

How much paint did he use to paint the apartment?

Ans:

42. Nina and Ariel had an equal number of dolls at first.

After Nina gave Ariel 10 dolls, she had 25 dolls left.

How many dolls didAriel have in the end?

Ans: 15

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43. Gillian bought an equal number of pens and pencils. She spent a total of $24.

Given that a pen cost $1.80 and a pencil cost $0.60 less than a pen, how many

pencils did Gillian buy?

Ans:

44. Harry had some posters.

He gave 1 of the posters to Jerry and 1 of them to Lisa.

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W hat fraction of the posters was left?

Ans: 16

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45. The area of a square is 36 m². The breadth of a rectangle is the same as the

length of 1 side of the square. What is the perimeter of the rectangle?

20 m

square rectangle

Ans: 17

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46. There are 20 safety cones placed at an equal distance from one another along a

straight road. The distance between the 1st safety cone and the 5th safety cone is

12 m. What is the distance from the 1st safety cone to the last safety cone?

1st 2nd 3rd 4th 5th ….. 20th

Ans: 18

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