Question

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

Answer 1

Answer:

The number to add is 5

Step-by-step explanation:

Let

x ----> the number to add

we have that

$-2\frac{1}{2} +x=2\frac{1}{2}$

Convert mixed number to an improper fraction

$2\frac{1}{2}=\frac{2*2+1}{2}=\frac{5}{2}$

substitute

$-\frac{5}{2} +x=\frac{5}{2}$

Solve for x

Adds 5/2 both sides

$x=\frac{5}{2}+\frac{5}{2}$

$x=\frac{10}{2}$

$x=5$