Răspuns:
1. 40+60=100
5-3= 2
50-30= 20
10-7= 3
100-70= 30
5+4= 9
50+40= 90
9-8= 1
90-80= 10
30+60= 90
8-3= 5
80-30= 50
9+1= 10
90+10= 100
3-2= 1
30-20= 10
10-5= 5
100-50= 50
2. 50+50= 100
60-40= 20
10+80= 90
90-60= 30
20+80= 100
40+40= 80
40+30= 70
80-30= 50
20+60= 80
50-40= 10
80-70= 10
70-20= 50