Answer:
1.) different, subtract, 14
2.) same, add, -33
3.) same, add, -70
4.) different, subtract, 0
5.) different, subtract, -10
6.) different, add, 12
7.) same, subtract, 3
8.) different, subtract, -4
9.) different, subtract, -4
10.) 14
11.) Mark has more, he has $14 more
12.) 9
13) -13 - 12 = -25
14) 200 - 40 = 60
15) 12 - 3 = 8
