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.
mastering maths wb3B.indd 1
( 201112597 C )
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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
0ii Cont Maths Pri 3B.indd 1
12/26/12 9:50 AM
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
10 Math Pri 3B.indd 1
12/26/12 9:51 AM
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
10 Math Pri 3B.indd 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
10 Math Pri 3B.indd 3
12/26/12 9:51 AM
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
10 Math Pri 3B.indd 4
12/26/12 9:51 AM
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
10 Math Pri 3B.indd 5
12/26/12 9:51 AM
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
10 Math Pri 3B.indd 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
10 Math Pri 3B.indd 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
10 Math Pri 3B.indd 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
10 Math Pri 3B.indd 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
11 Math Pri 3B.indd 10
12/26/12 9:52 AM
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
11 Math Pri 3B.indd 11
12/26/12 9:52 AM
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
12/26/12 9:52 AM
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
11 Math Pri 3B.indd 13
12/26/12 9:52 AM
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
11 Math Pri 3B.indd 14
12/26/12 9:52 AM
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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