Question

find rational number 1/2(-1/70+2/5) please full process​

Answer 1

27/140

Step-by-step explanation:

Here we need to follow DMAS rule, which says that when we have multiple operations. We do division first, then multiplication, then addition and subtraction in the last.

So,

1/2 (-1/70+2/5)

First, we will multiply because we need to provide rational number. So, we can not divide term further

1/2 x -1/70 + 1/2 x 2/5

-1/140 + 1/5

(-1+28)/140

27/140