add
9+18
what is 27
add, plus, more
what is addition
10-2
what is 8
90/3
what is 60
3x3
what is 9
15+15
what is 30
less, take away
what is subtraction
18-9
what is 9
300/100
what is 3
8x7
what is 56
80 + 27
what is 107
double, triple
what is multiplication
80-20
what is 60
90/90
what is 1
8x8
what is 64
10+ 1
what is 11
break apart
what is division
100-30
900/1
what is 900
9x9
what is 81
900 + 2000
what is 2,900
shapes with angles
what is geometry
1000-2000
what is -1,000
80/4
what is 20
80x2
what is 160