Addition
1+1=?
2
40-30
10
3x3
6
1/1=?
1
x-3=4x2
x=11
20+20-=?
40
17-20
-3
6x8
48
4/2=?
2
x+2=7x2
x=12
160
80-36
56
9x9
81
36/9=?
4
x+23=40-18
x=32
2020+2020
4040
707-40
667
2x4
8
150/50=?
3
x=4x3
x=12
9,571,796,938,175+212=?
9,517,938,387
12121212-4
1212128
20x20
400
20000/10000
2
S=9