Page 97 - Math Skill - 1

Addition and Subtraction up to 99 95

Addition without Regrouping/Carry Over

Add 45 and 33.

To add 45 and 33, 45 T O
we can use blocks. 4 5

+ 3 3
33

T O

Add the ones. 4 5

Count all the ones blocks.

5 Ones + 3 Ones = 8 Ones + 3 3
8

T O
Add the tens. 4 5

Count all the tens blocks.

4 Tens + 3 Tens = 7 Tens + 3 3
7 8

So, 45 + 33 = 78

Add the following.

T O T O T O T O

4 9 2 3 4 3 7 2

+ 2 0 + 5 5 + 1 0 + 2 3