Mental Math

It's time to practice some addition!

Close your eyes and picture a hundreds chart. You should be able to mentally add 1, 2, 11, or 12 to any number quickly. Just move right or down on your hundreds chart.

Add these numbers, then click the math fact to reveal the answer.

Math Fact		Answer
28 + 11	=	39
7 + 12	=	19
15 + 2	=	17
22 + 1	=	23
45 + 2	=	47
18 + 2	=	20
7 + 11	=	18
10 + 11	=	21
12 + 10	=	22
11 + 2	=	13
15 + 10	=	25
16 + 12	=	28
2 + 24	=	26
62 + 10	=	72
98 + 2	=	100
12 + 3	=	15
18 + 12	=	30
2 + 17	=	19
14 + 11	=	25
2 + 40	=	42