46 MATHEMATICS
EXERCISE 2.4
- Find:
(i)
12 3
4
(ii) 14 5
6 (iii) 8 7
3 (iv) 4 8
3(v)
321
3
(vi) 534
7
- Find the reciprocal of each of the following fractions. Classify the reciprocals as
proper fractions, improper fractions and whole numbers.
(i)
3
7 (ii)5
8 (iii)9
7 (iv)6
5
(v)
12
7 (vi)1
8 (vii)1
11- Find:
(i)
(^72)
3
(ii)^45
9
(iii)^67
13
(iv) 41
3
3
(v)
341
2
(vi) 473
7
- Find:
(i)
21
52
(ii)^42
93 (iii)^38
77 (iv) 213
35 (v) 31
28
3(vi)(^211)
52
(vii) 3112
53
(viii) 2111
55
2.4 HOW WELL HAVE YOU LEARNT ABOUT DECIMAL NUMBERS
You have learnt about decimal numbers in the earlier classes. Let us briefly recall them
here. Look at the following table and fill up the blank spaces.
Hundreds Tens Ones Tenths Hundredths Thousandths Number
(100) (10) (1)
1
10
1
100
1
1000
2 5 3 1 4 7 253.147
6 2 9 3 2 1 ..............
0 4 3 1 9 2 ..............
........ 1 4 2 5 1 514.251
2 ....... 6 5 1 2 236.512
........ 2 ........ 5 ........ 3 724.503
6 ....... 4 ........ 2 ....... 614.326
0 1 0 5 3 0 ...............