Page 102 - New Medley 4 Semester 2 PDF (Merged)

C. Subtract.
1 2 7 9 5 8 2 9
1. from 2. from 3. from 4. from
3 3 13 13 15 15 11 11
8 13 5 13 13 18 20 36
5. from 6. from 7. from 8. from
17 17 21 21 25 25 40 40

D. Find the difference.
8 1 16 11 23 17 26 13
1. - 2. - 3. - 4. -
25 25 40 40 35 35 60 60

25 5 29 12 31 7 35 12
5. - 6. - 7. - 8. -
80 80 60 60 50 50 48 48

E. Solve the following.

1 2 1 3 1 2 4 7 5 13 3 4
1. + + 2. + - 3. - + 4. - -
5 5 5 8 8 8 12 12 12 15 15 15

Addition and Subtraction of Unlike Fractions

To add or subtract unlike fractions, convert them into like fractions and

then solve as learnt earlier.

2 4
Example 13: Add and .
3 5
2 4
Solution: To convert and into like fractions, find the LCM of
3 5

their denominators. As 3 and 5 are co-primes, so the LCM
of 3 and 5 = 3 × 5 = 15

2 2× 5 10 4 4× 3 12
Therefore, = = and = =
3 3× 5 15 5 5× 3 15

2 4 10 12 10 +12 22 7
Now, + = + = = =1
3 5 15 15 15 15 15

(Result should be in the mixed fraction.)

5 3
Example 14: Subtract from .
12 4

100