Estimate the sum or difference 1/8+1/4

For this case we have the following expression:

To make the addition more easily, we can rewrite the expression so that we have the same denominator in both terms.

We have then:

Since we have the same denominator, we can add the numerators and place the same denominator.

We have then:

The total sum is given by:

the answer is 31.27mph

is there any photos or whatever?