Question

FIND THE SUM:
FIND THE DIFFERENCE:

Answer 1

1. 20... 2. 31... 3. -50

Explanation:

1. 8+12=20

2. 13+18=31

3.-20+-30=-50

4. -15+3=-12

5. -80+20=-60

1. 8-12=-4

2. 13-18=-5

3. -20--30=-50

4. -15-3=-18

5. 80--20=60