Page 29 - Math Skill - 2

Addition of 2-digit Numbers 27

Adding three 2-digit Numbers

The concept of adding three 2-digit numbers is just similar to the adding

two 2-digit numbers without or with regrouping.
Tens Ones
Let us add 35, 22 and 27. 1

Step 1: Arrange the addends in columns under tens and 3 5

ones. 2 2

Step 2: Add the ones first. + 2 7

Step 3: 5 ones + 2 ones + 7 ones = 14 ones = 1 ten + 4 ones 8 4

Write 4 in ones column and take 1 ten to the tens column as carry.

Step 4: Add the tens.

3 tens + 2 tens + 2 tens + 1 ten (carried over) = 8 tens.

Write 8 in the tens column.

Add the following (without regrouping).

T O T O T O T O
1 0 4 1 5 2 6 3

2 2 2 0 2 2 1 2

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

T O T O T O T O
2 3 1 3 4 2 3 3

3 3 3 2 1 0 2 2
+ 3 1 + 1 0 + 3 6 + 4 2