Page 222 - Start Up Mathematics_5

Chapter 5: Fractions—Multiplication and Division Let’s Evaluate

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Exercise 5.1 1. (a) 18 (b) (c) 247 (d) 4 (e) 221
5 2 21 21 3
1. (a) 21 (b) 8 (c) 8 (d) 14 (e) 18 2. (a) 2 (b) 2 (c) 3 (d) 351 (e) 10
5 7 3 3 5 25 2 14 3
(f) 5 (g) 99 (h) 15 (i) 7 (j) 14 3. (a) True (b) False (c) True (d) True
3 20 11 4 9

(k) 13 (l) 7 (m) 2 (n) 13 (o) 18 (e) True (f) False
3 4 3 7 5 4. 59 or 1 21 5. 1
2. (a) 24 (b) 50 (c) 5 (d) 6 38 38 18
4 Values and Life Skills
(e) 20,000 (f) 6 (g) 105 (h) 9,000 2
3 8 1. 9 2. ` 140
Exercise 5.2
Scratch Your Brain
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1. (a) 1 (b) 8 (c) 18 (d) (e) 22 (f) 9 1. (a) 9 (b) 1 2. 378
6 15 77 9 39 56 8 225 121
1
6
4
(g) (h) (i) (j) 1
6 7 9 16 Chapter 6: Understanding Decimals
2. (a) 5 (b) 5 (c) 14 (d) 10 (e) 8 (f) 10 Exercise 6.1
63 252 33 63 105 63 1. (a) Place value of 3 = 3 tens or 30,
3. (a) 36 (b) 26 (c) 35 (d) 18 (e) 27 (f) 7 place value of 2 = 2 hundredths or 2
7 5 2 5 7 3 100
5
4
(g) (h) (i) 121 (j) 7 (b) Place value of 2 = 2 ones,
6
3 5 5 3 place value of 6 = 6 hundredths or 100
3
1
4. (a) 0 (b) (c) (d) 75 (e) 6 (f) 5 (c) Place value of 0 = 0 tenths,
7 3 93 13 7 4
place value of 4 = 4 thousandths or
Exercise 5.3 1000
(d) Place value of 1 = 1 tens or 10,
1. (a) 11 (b) 5 (c) 16 (d) 15 (e) 1 3
3 2 3 9 14 place value of 3 = 3 tenths or 10
(f) 1 (g) 17 (h) 1 (i) 43 (j) 57 (e) Place value of 6 = 6 thousands or 6000,
20 12 27 82
(k) 75 (l) 54 (m) 103 (n) 19 (o) 134 place value of 1 = 1 tens or 10
108 81 72 15 99 place value of 9 = 9 thousandths or 9

2. (a) 21 (b) 55 (c) 65 (d) 100 (e) 96 1000
3 7 2. (a) 5 tens + 7 ones + 6 tenths + 9 hundredths
(f) 2 (g) 5 (h) 4 (i) 2 (j) 1 = 50 + 7 + 6 + 9
7 22 45 15 5 10 100
(k) 13 (l) 13 (m) 3 (n) 35 (o) 125 (b) 2 tens + 4 ones + 3 tenths + 0 hundredths +
14 60 11 18 16 6 thousandths
3. (a) 3 (b) 6 (c) 7 (d) 39 (e) 45 = 20 + 4 + 3 + 0 + 6
4 7 3 20 16 10 100 1000
3
(f) 28 = 28 (g) 123 (h) (i) 15 (j) 4 (c) 1 hundred + 3 tens + 4 hundredths + 5 thousandths
1 58 2 7 3 = 100 + 30 + 4 + 5
4. (a) 1 (b) 8 (c) 0 (d) not defined (e) 1 (f) 16 100 1000
11 21 (d) 1 hundred + 9 tens + 6 ones + 2 tenths +
Exercise 5.4
7 hundredths = 100 + 90 + 6 + 2 + 7
1
1. 1 2. 9 hours 3. 11 kg 4. 2 10 100
4 3 (e) 8 hundred + 1 ten + 4 ones + 2 hundredths +
5. 1 of cake 6. 2 3 km 7. ` 80 5 thousandths = 800 + 10 + 4 + 2 + 5
8 10 100 1000

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