Page 31 - Maths Skills - 7

Fractions and Decimals 29

3 38
= 21 × = 114 km
7
1
Hence, the distance covered by the car is 114 km.

Example 6: Find the reciprocals of:

3 2 9
(i) (ii) 11 (iii) 1 (iv)
5 3 13
3 5 1
Solution: (i) Reciprocal of is (ii) Reciprocal of 11 is
5 3 11

2 5 9 13
(iii) 1 = (iv) Reciprocal of is
3 3 13 9
5 3
Hence, reciprocal of is
3 5

Exercise 2.2

1. Fill in the blanks.
4 5 3
(i) × 0 = ____ (ii) 2 × 1 = ____ (iii) × ____ = 0
3 6 17
8 1 1 4 5 6 6
(iv) × = × ____ (v) × = ____ (vi) × ____ =
7 5 5 5 4 11 11

2. Multiply.
3 99 18 57 39 2
(i) and (ii) and (iii) and
11 333 19 108 46 13

6 51 8 3 5 21
(iv) and (v) and (vi) and
17 72 6 19 7 35

3. Find the product.
1 1 15 1 12 1 121
(i) 8 × 2 (ii) × 1 (iii) × 1 ×
3 7 9 5 11 16 144
5 1 8
4. (i) How much is 4 times ? (ii) How much is 7 times 2 ? (iii) How much is 5 times ?
12 21 25
5. Find:

7 6 3 3 2
(i) of 285 (ii) of 60 (iii) of 95 (iv) of
15 15 9 8 9

6. Find the value of:
1 2 1
(i) of a rupee (ii) of a kg (iii) of a metre
2 5 10
3 1 3
(iv) of a litre (v) of 6 kg (vi) of ` 40
5 2 10