Step 1 – Add the numbers in the ONES Column.If the sum of ONES is more than 9 , then we regroup the 10 ONES as 1 TEN and add it to the TENS.
In other words ,if the sum of ONES column is forming 2 digit number then write the ONES in the ONES column and carry over the TEN to the TENS column
Step 2 – Add the carried over TEN to the digit already in the TENS column and write the sum in the TENS column.