addition
25+46
71
11-11
0
20×5
100
60+70
130
1+2
3
32+68
100
100-90-10-10
-10
9x9
90
30-40
-10
1×1010
1010
50+60+30
140
40-7-20
13
31×2×2
124
40+x=900
860
20+508+2
530
400+409+402+3
1214
100-42-36
22
20×20
400
40+40+20-20+30
110
40×40
1600
124+40+1+567
731
400-230-30-10-23
107
70×85
5950
701×X=1002
2
20000×50
1000000