Question

The temperature went from -16°F to 7°F. What was the change in temperature?

Answer 1

23 degrees

Explanation:

From `-16 ^o F->0 ^o F=16^o` up
from `0 ^o F->7 ^o F=7^o` up

Total change `=16+7=23^o F` up

Or in math language:
Change is Old minus New:
`+7-(-16)=+7+16=+23^o` up