1+3= 8-2= 4-3= 2+3= 8-4= 6-3=
4+3= 8-6= 5-3=
6+3= 8-5= 8-3=
3+3= 8-3= 7-3=
5+3= 8-7= 9-3=
2+3= 9-5= 8-4+1=
2+5= 9-4= 2+7-1=
2+4= 9-7= 5-3+4=
2+7= 9-6= 7-5-1=
2+6= 9-8= 6-2+5=
13 – 6 = 12 - 4 = 12 – 9 =
14 – 8 = 16 – 9 = 11 – 5 =
11 – 7 = 11 – 2 = 16 – 8 =
14 – 5 = 13 – 8 = 14 – 7 =
14 – 6 = 13 – 4 = 13 – 9 =
15 – 8 = 17 – 9 = 12 – 5 =
12 – 7 = 12 – 3 = 17 – 8 =
15 – 6 = 14 – 8 = 15 – 7 =
60 + 40 = 30 + 10 = 80 + 20 – 50 + 20 =
100 – 50 = 100 – 70 = 70 + 30 – 60 – 20 =
30 + 30 = 90 – 20 = 30 + 50 + 20 - 50 =
80 – 70 = 10 + 60 = 100 – 20 -20- 10 =