Question

Simplify the following 5/7+-9/10​

Answer 1

Answer:

(5/7)+(-9/10)= (0.7)+(-0.9)=0.7-0.9=-0.2.

Answer 2

Answer:

First we need to take the L.C.M of 7 and 10

So the L.C.M of 7 and 10 is 70

Now, we will multiply 5 and 7 with 10 so that the numerator will be 70 after multiplying the answer will be 50/70

Same we will be doing with -9/10 so we will multiply it with 7 so the answer will be -63/70

Now,

50/70 + -63/70

= -13/70 Ans.