Question

What do you have to add to -2 1/2 to have a result of 2 1/2

Answer 1

The number to add is 5

Explanation:

Let

x ----> the number to add

we have that

`-2(1)/(2) +x=2(1)/(2)`

Convert mixed number to an improper fraction

`2(1)/(2)=(2*2+1)/(2)=(5)/(2)`

substitute

`-(5)/(2) +x=(5)/(2)`

Solve for x

Adds 5/2 both sides

`x=(5)/(2)+(5)/(2)`

`x=(10)/(2)`

`x=5`