Adding & subtracting project

Adding integers

100

(-3) + 4 =

what is 7

200

(-15) + (-16) 

what is 1

300

(-237729174683) + 0

what is 0

400

(-57) + 24 =

what is 81

500

(-239) + (-543) = 

_{what is 304}

Subtracting integers

100

(-1) -(-1) =

what is 0

200

(-23) - (-15) =

what is 8