Addition
4+5
9
6-3
3
3 rows of 4
4+4+4
Bill has 8 blue marbles and 3 red marbles. How many marbles does he have in all?
8+3=11
8+2
10
9-7
2
2 rows of 6
6+6
Stephanie sees 15 monkeys and 9 zebras at the zoo. How many more monkeys than zebras did she see?
15-9=6
6+8
14
14-6
8
5 rows of 5
5+5+5+5+5
Tim has 6 baseballs, 4 footballs, and 8 basketballs. How many balls does he have in all?
6+4+8=18
9+6
15
16-9
7
4 rows of 2
2+2+2+2
Mike and 2 friends have 5 cookies each. How many cookies do they?
5+5+5