Mastering Mathematics 3B

WMPB13033B

Primary

Mastering Mathematics is a comprehensive series of assessment workbooks which is written based on the latest Primary Mathematics Syllabus issued by the Ministry of Education of Singapore. Each of the workbooks provides sufficient practices on various types of questions. The approach adopted by the writer aims at reinforcing mastery of mathematical concepts, improving problem-solving skills and developing creative and critical thinking skills.

Topic-By-Topic Mastering Mathematics Workbook 3B

Special Features

3 Topical-based practices 3 5 sets of revision papers 3 Challenging questions 3 Complete answers

Latest

MOE Syllabus

Primary WMPB13033B ISBN 978-981-07-1229-7

Pelangi Publishing Singapore Pte. Ltd.

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Lilian Yeo

8/20/14 2:44 PM

Unit 10

Money............................................................ 1

Unit 11

Length, Mass and Volume....................................10

Unit 12

Solving Word Problems: Length, Mass and Volume..... 22

General Revision 1......................................................... 28 Unit 13

Bar Graphs.................................................... 34

Unit 14

Fractions....................................................... 43

Unit 15

Time............................................................ 53

General Revision 2 ........................................................ 63 Unit 16

Angles.......................................................... 70

Unit 17

Perpendicular and Parallel Lines........................... 78

Unit 18

Area and Perimeter.......................................... 86

General Revision 3 ........................................................ 95 Final Revision ............................................................. 103 Challenging Questions .................................................. 1 1 2 Answers ................................................................. 1 1 7

iv

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Mathematics Primary 3B Unit 10 Money

10

Money

A Add the following.

1. $12.00 + $26.00 $26

$12

=$

2. $31.20 + $23.00 $31

3. $43.00 + $25.15

$43

=$ =$

+

75¢

¢

$63

=$ =$

¢

$7.55 20¢ $3

=$ =$

=$

+

=$

¢

=$

+ $

=$

8. $45.45 + $26.95

80¢

+$

=$

¢

$13 35¢ $22 65¢

7. $7.75 + $3.80

+

6. $13.35 + $22.65

15¢

+

=$

$69 10¢ $20 50¢

5. $0.75 + $63.15

$23

4. $69.10 + $20.50

15¢

$25

20¢

$45.40

5¢ $26

=$

+ $

=$

95¢

1

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Mathematics Primary 3B Unit 10 Money

B Fill in the blanks with the correct answers.

1. $5.70 + $0.80 = ?

$5.70 + $ 1 = $

$

So, $5.70 + $0.80 = $

– 10¢ = $

2. $4.75 + $0.95 = ?

$4.75 + $

= $

$

So, $4.75 + $0.95 = $

–

¢ = $

3. $18.80 + $12.10 = ?

$

+ $

= $

$

+

So, $18.80 + $12.10 = $

¢ = $

4. $1.85 + $9.15 = ?

$

+ $

+

= $

+

¢

= $

+ $

= $

So, $1.85 + $9.15 = $

¢ +

¢

2

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Mathematics Primary 3B Unit 10 Money

C Add. 1.

3.

5.

7.

9.

$ 9 . 3 0

2.

$ 3 . 4 5

+ $ 1 . 5 0

+ $ 4 . 2 5

$ 2 . 4 5

4.

$ 3 . 4 0

+ $ 7 . 9 5

+ $ 8 . 6 0

$ 4 . 4 5

6.

$ 1 1 . 0 5

+ $ 9 . 8 0

+ $ 2 5 . 9 5

$ 1 0 . 7 0

8.

$ 3 5 . 6 5

+ $ 2 2 . 3 0

+ $ 2 9 . 7 0

$ 9 . 5 0

10.

$ 2 8 . 5 5

+ $ 1 6 . 3 5

+ $ 9 . 4 5

3

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Mathematics Primary 3B Unit 10 Money

D Subtract the following.

1. $47.30 – $4.00

$47 30¢

$4

=$ =$

+

2. $29.95 – $0.60 $29 95¢ 60¢

¢

=$ =$

$47 – $4 = $

$25 45¢

$2

=$ =$

+

$

–$

¢

=$ =$

=$

¢–

¢

=$ =$

$

+

¢

¢

+

¢

¢

8. $8.35 – $8.20

70¢

35¢ $8

$8

¢

=$ =$

–$ ¢–

¢=

$25 – $18 = $ 40¢ – 20¢ =

7. $32.70 – $11.70 =$ =$

¢

$25 40¢ $18 20¢

$32 70¢ $11

+

6. $25.40 – $18.20

+

$98 – $18 = $ 85¢ – 25¢ =

65¢ 40¢

$8

$98 85¢ $18 25¢

=$ =$

¢

4. $8.65 – $0.40

5. $98.85 – $18.25

¢

95¢ – 60¢ =

3. $25.45 – $2.00

+

=$ ¢=

$ ¢

20¢

+ –$ ¢–

¢ =$ ¢=

¢

4

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Mathematics Primary 3B Unit 10 Money

E Fill in the blanks with the correct answers.

1. $2.30 – $0.80 = ?

$2.30 – $ 1 = $

$

So, $2.30 – $0.80 = $

+ 20¢ = $

2. $47.55 – $0.85 = ?

$47.55 – $

= $

$

So, $47.55 – $0.85= $

+ 15¢ = $

3. $87.10 – $5.90 = ?

$

– $

= $

$

+

So, $87.10 – $5.90 = $

¢ = $

4. $53.45 – $8.85 = ?

$

– $

= $

$

+

So, $53.45 – $8.85 = $

¢ = $

5. $64.50 – $9.10 = ?

$

– $

= $

$

–

So, $64.50 – $9.10= $

¢ = $

5

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Mathematics Primary 3B Unit 10 Money

F Subtract.

1.

3.

5.

7.

9.

$ 9 . 8 0

2.

$ 8 . 7 5

– $ 2 . 6 0

– $ 3 . 2 0

$ 7 3 . 2 0

4.

$ 2 0 . 9 5

– $ 2 1 . 9 0

– $ 4 . 3 5

$ 5 7 . 3 0

6.

$ 8 7 . 0 5

– $ 3 6 . 7 0

– $ 5 2 . 7 5

$ 6 3 . 1 5

8.

$ 3 5 . 0 0

– $ 4 5 . 7 5

– $ 7 . 8 5

$ 4 8 . 4 0

10.

$ 9 0 . 5 0

– $ 6 . 5 0

– $ 6 5 . 4 5

6

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Mathematics Primary 3B Unit 10 Money

G Solve the following word problems.

1. Ben bought a pen for $1.20 and an eraser for $0.55. How much did Ben spend altogether?

2. A box of cornflakes costs $7.65. A carton of milk costs $2.15.

What is the total cost of one box of cornflakes and one carton of milk?

3. Tim saved $6.50 in May. He managed to save twice the amount of May in June. How much did Tim save in these two months?

7

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Mathematics Primary 3B Unit 10 Money

4. Peter had $18.95 in his wallet. He spent $7.30 at the bookshop.

How much money did Peter have left in his wallet?

5. Kenny had $55.50. He bought a dictionary and had $12.60 left.

How much did Kenny spend on the dictionary?

6. A dress costs $29.95. A pair of jeans costs $5.60 more than a dress. If Louise wants to buy a dress and a pair of jeans, how much does she need to pay altogether?

8

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Mathematics Primary 3B Unit 10 Money

7. Jimmy bought a pair of sport shoes. He gave the cashier a fifty-dollar note. He received $1.85 in change. What was the cost of the sport shoes?

8. Bill bought some doughnuts at $3 each. He gave the cashier $50 and received $14 change. How many doughnuts did Bill buy?

9. Dan spends $35 on 3 workbooks and 1 reference book. The reference book costs $3 more than each workbook. Find the price of the reference book.

9

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Mathematics Primary 3B Unit 11 Length, Mass and Volume

11

Length, Mass and Volume

A Complete the following.

1. 3 m 91 cm

m = cm

3 m 91 cm =

cm +

cm

=

2. 4 m 75 cm

m =

4 m 75 cm =

cm +

cm

3. 7 m 83 cm

m =

cm

cm

cm

cm

7 m 83 cm =

cm +

cm

=

cm

cm

=

cm

cm

10

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Mathematics Primary 3B Unit 11 Length, Mass and Volume

4. 273 cm

cm = cm

273 cm =

cm +

m

=

5. 607 cm

cm =

m

cm

607 cm =

cm +

m

6. 914 cm

cm cm

cm =

m

cm

914 cm =

cm +

m

=

cm cm

=

m

cm cm

B Write in centimetres.

1. 2 m 5 cm =

cm

2. 6 m 60 cm =

cm

3. 9 m 30 cm =

cm

4. 7 m 58 cm =

cm

5. 5 m 47 cm =

cm

6. 8 m 20 cm =

cm 11

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Mathematics Primary 3B Unit 11 Length, Mass and Volume

C Write in metres and centimetres.

1. 355 cm =

m

cm

2. 657 cm =

m

cm

3. 182 cm =

m

cm

4. 584 cm =

m

cm

5. 793 cm =

m

cm

6. 422 cm =

m

cm

D Complete the following.

1 km =

m

1. 1 km 200 m

200 m

1 km 200 m =

m+

m

=

6 km =

m

m

2. 6 km 310 m

310 m

6 km 310 m =

m+

m

=

9 km =

m

m

3. 9 km 800 m 800 m

9 km 800 m =

m+

m

=

m

12

11 Math Pri 3B.indd 12

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Mathematics Primary 3B Unit 11 Length, Mass and Volume

m=

km

4. 2020 m m

2020 m =

m+

km

=

m m

m=

km

5. 6305 m m

6305 m =

m+

km

=

m m

m=

km

6. 9345 m m

9345 m =

m+

km

=

m m

13

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Mathematics Primary 3B Unit 11 Length, Mass and Volume

E Write in metres.

1. 2 km 21 m =

m

2. 5 km 544 m =

m

3. 4 km 62 m =

m

4. 3 km 50 m =

m

5. 8 km 70 m =

m

6. 9 km 35 m =

m

F Write in kilometres and metres.

1. 5800 m =

km

m

2. 7007 m =

km

m

3. 3600 m =

km

m

4. 8012 m =

km

m

5. 5804 m =

km

m

6. 6543 m =

km

m

14

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Mathematics Primary 3B Unit 11 Length, Mass and Volume

G Read the scales and write the mass of each item.

1.

2.

0 2kg

0 1kg 750g

250g 500g

1kg

The mass of the apples

The mass of the carrots

is

is

g.

3.

g.

4.

0 4kg 3kg

5kg 1kg

0 6kg

4kg

1kg 2kg

3kg

2kg

The mass of the pineapple

The mass of the watermelon

is

is

g.

g.

15

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