Question

what temperature is 10 degrees higher than minus 7 degrees

Answer 1

$-7^o+10^o=\boxed{3^o}$

Answer 2

This could be done in two ways:
Using a sum
It would be:
-7 + 10
which equals 3

Using a numberline
See the attached numberline. Find -7, and count 10 along to the right to find the answer (3)