1
40+..........= 70
2
20 + .........=85
3
61+ ...... =68
4
93+.....=99
5
....... -10=20
6
........ -60=30
7
........... -40=10
8
.............. -50=40
9
60+4=
10
60+7=
11
60+9=
12
8+40=
13
8+70=
14