simply math
yay math
hard math
100
what is 18 +18
100
30+30
60
100
70+70
140
200
3+7
10
200
10+10
20
200
100+300
400
300
8+16
24
300
50+50
100
300
800-200
600
400
100+100
200
400
40+40
80
400
500-300
200
500
300+400
700
500
20+20
40
500
700-600
100