CLASS-2
ADDITION OF THREE DOUBLE DIGIT NUMBER WITH REGROUPING

METHOD OF SOLUTION

Step 1. - Add the 'Ones'

6 Ones + 7 Ones + 8 Ones = 21 Ones

21 Ones = 2 Tens 1 Ones

Write 1 in the 'Ones' column and

take 2 Tens at the top of 'Tens' column

Step 2. -  Add the 'Tens'                                      

            2 Tens + 4 Tens + 2 Tens + 1 Ones = 9 Tens.

            Write 9 Tens to the 'Tens' Column.

            So, the answer is 91.      (Ans.)

2) Add 39 + 18 + 36 =?

METHOD OF SOLUTION -

Step 1. - Add the 'Ones'

9 Ones + 8 Ones + 6 Ones = 23 Ones

23 Ones = 2 Tens 3 Ones

Write 3 in the 'Ones' column and

take 2 Tens at the top of 'Tens' column

Step 2. -  Add the 'Tens'                                       

            2 Tens + 3 Tens + 1 Tens + 3 Ones = 9 Tens.

            Write 9 Tens to the 'Tens' Column.

            So, the answer is 93.         (Ans.)

3) Add 24 + 32 + 29 =?

METHOD OF SOLUTION -

Step 1. - Add the 'Ones'

4 Ones + 2 Ones + 9 Ones = 15 Ones

15 Ones = 1 Ten 5 Ones

Write 5 in the 'Ones' column and

take 1 Ten at the top of 'Tens' column

Step 2. -  Add the 'Tens'                                      

            1 Tens + 2 Tens + 3 Tens + 2 Ones = 8 Tens.

            Write 8 Tens to the 'Tens' Column.

            So, the answer is 85 .    (Ans.)