Page 99 - Math Skill - 1

Addition and Subtraction up to 99 97

12 Ones = 1 Ten and

2 Ones T O
1
Write 2 in the Ones 2 5
column of the answer + 1 7

and carry over 1 Ten
to the tens column. 2

Next, add the tens. T O

1
1 Ten + 2 Tens + 1 2 5
Ten (carried over)

= 4 Tens 1 7

So, 25 + 17 = 42 4 2

Add the following.

T O T O T O T O

4 9 4 8 6 2 5 6

+ 2 3 + 3 7 + 1 9 + 1 4

T O T O T O T O

2 6 1 8 4 4 6 4
+ 3 9 + 2 8 + 2 9 + 2 6