Page 226 - Maths Skills - 7

224 Maths

Chapter - 2: Fractions and Decimals

Boot-up
4
A. 1. (iv) 2. (ii) 3. (ii) 4. (iii) B. 1. 567 2. 8 hundredth 3. 8 or 4. greater
10 5
C. 1. T 2. F 3. T 4. F
Exercise - 2.1
8 12 20 79
1. (i) (ii) (iii) (iv)
11 17 51 125
6 2 10 6 20
2. (i) or (ii) (iii) (iv)
15 5 71 37 91
7 17 7 67 4 5 58 4 167 32
3. (i) (ii) (iii) (iv) or 3 (v) 12 (vi) or 6 (vii) or 3 (viii) 11
34 25 142 21 21 6 9 9 45 45
3 19 37 26 33 7 5 1
4. (i) (ii) (iii) (iv) 5. Cost of notebook is ` 12 more than pen. 6. 29 kg 7. 11 kg, 10 kg
22 146 102 15 35 12 6 2
Exercise - 2.2

5 8
1. (i) 0 (ii) 2 (iii) 0 (iv) (v) 1 (vi) 1
6 7
3 1 3 1 4 3
2. (i) (ii) (iii) (iv) (v) (vi)
37 2 23 4 19 7
6 187
3. (i) 17 (ii) 2 (iii)
7 192
2 1 3 1
4. (i) 1 (ii) 14 (iii) 1 5. (i) 133 (ii) 24 (iii) 15 (iv)
3 3 5 12
9 7 19 5
6. (i) 50 paise (ii) 400 g (iii) 10 cm (iv) 600 ml (v) 3 kg (vi) ` 12 7. (i) (ii) (iii) (iv)
7 18 5 13
8. ` 1800 9. Used cloth = 4.5 m, Remaining cloth = 1.5 m 10. 300 ml 11. (i) 800 (ii) 600 (iii) 1000
Exercise - 2.3
3 1 1 7
1. (i) (ii) 17 (iii) (iv) 14 (v) 4 (vi)
17 2 2 48
1 57 3 25 3
2. (i) 2 (ii) 3 (iii) 6 (iv) 5 (v) (vi)
4 64 7 56 5
32 1
3. 500 g 4. 22 5. 10 6. 7. 8. 20
723 5
Exercise - 2.4
1. (i) 28.8 (ii) 10.64 (iii) 9.932 (iv) 198.24 (v) 9.216 (vi) 8.76 (vii) 8.268 (viii) 54.315
(ix) 0.2862 (x) 88.928 (xi) 6.24 (xii) 719.436 2. (i) 4.2 (ii) 66.67 (iii) 1.21 (iv) 0.11
(v) 0.00611 (vi) 33.35 (vii) 0.007 (viii) 0.042 3. (i) 71.2 (ii) 768.00 (iii) 5.2 (iv) 7128.5
(v) 283.62 (vi) 78.12 4. (i) 1.4 (ii) 2.4 (iii) 2.5 (iv) 12.1 (v) 0.71 (vi) 70.3
(vii) 0.07 (viii) 160.1 (ix) 109.09 (x) 12 (xi) 2711.00 (xii) 110.25 5. (i) 0.7165 (ii) 7.8516
(iii) 3.368 (iv) 178.52 (v) 0.2896 (vi) 7.186 (vii) 7.7865 (viii) 7.6835
Exercise - 2.5
1. 7 shirts 2. 15 bottles 3. ` 27.25 4. ` 2018.25 5. 13 containers 6. 638.75 kg 7. 2.1 8. 9.25 m
9. ` 2987.75 10. 5 pieces
Exercise - 2.6
1. (i) 2.660 (ii) 19.000 (iii) 128.160 (iv) 275.110 (v) 368.110 (vi) 66.130 (vii) 14.1400 (viii) 3.5300
2. (i) 57.700 (ii) 175.000 (iii) 66.800 (iv) 225.400 (v) 667.200 (vi) 39.700 (vii) 127.600 (viii) 12.000
3. (i) 40.000 (ii) 667.00 (iii) 39.00 (iv) 26.00 (v) 166.000 (vi) 766.00 (vii) 72.000 (viii) 36.000
Assessment Time
A. 1. (iii) 2. (i) 3. (ii) 4. (iv) 5. (ii) 6. (iii) 7. (i) 8. (ii)