Question

How much higher is checkpoint 4 than checkpoint 1
checkpoint 1= -86
checkpoint 4= 2,177

Answer 1

2177- -86=2263
turn the subtraction in to add and the negative into positive then add both numbers

Answer 2

Answer is 2263.
Checkpoint 1 is -86
Checkpoint 4 is 2177
Subtract -86 from 2177....2177-(-86)
=2263
2263 is how much higher checkpoint 1 (-86) is from checkpoint 4 (2177)

Hope this helps! :)