Question

3. Find the sum of the following
a) 1/7+9/7
b) 1/7+13/-11
c)-8/9+-3/5​

Answer 1

Answer:

a) 1/7+ 9/7

as the denominator are same

1+9/7

10/7

b) 1/7+13/(-11)

equalising the denominator

LCM of 7 and (-11) is 77

1/7×11/11 + 13/(-11)× 7/7

11/77 - 91/77

11-91/77

80/77

c) -8/9+(-3)/5

equalisng the denominator

LCM of 9 and 5 is 45

-8/9×5/5 + (-3)/5×9/9

-40/45+ (-27)/45

-40-27/45

-67/45

Answer 2

Hope this helps you........

Please mark as brainliest..........