addition
6+7=
what is 13
5-5=
what is 0
5X4=
what is 20
100,000,000+500,000,000=
what is 600,000,000
1,555- 2,555=
what is 1,000
7X7=
what is 49
777+221+1=
what is 999
6-4=
what is 2
5X9=
what is 45
5,000+2,111=
what is 7,111
600-200=
what is 400
5X200
what is 1,0000
11111111+22222222=
what is 33333333
555555555-44444444
what is 111111111
5X2,000
what is 1,0000