Here we will learn adding 2digit numbers with regrouping and start working with easy numbers to get acquainted with the addition of two numbers.
How to add two twodigit numbers with carrying?
Let us follow the steps and start learning adding 2digit numbers with regrouping with the help of these examples.
1. 45 + 37
(i) First arrange the numbers vertically so that the tens' place digits and ones' place digits are lined up which means in simple one number should be written above the other number. Draw a line under the bottom number.
(ii) Add the ones place digits. Add (5 + 7 = 12). Place 2 in the ones column and place 1 above the tens column as shown.
(iii) Then add the tens' place digits. Add (4 + 3 + 1 = 8) and place 8 in the tens column as shown.
(iv) The answer of the sum 45 + 37 is 82.
Method II: 45 + 37
Add the ones place:
5 ones + 7 ones = 12 ones
Regroup 12 ones
12 ones = 10 ones + 2 ones
= 1 ten + 2 ones
Place 2 in the ones answer column and place 1 in the tens carryup column.
Add the tens place:
4 tens +3 tens + 1 tens = 8 tens
Place 8 in the tens answer column.
So, adding 45 + 37 = 82.
2. 58 + 39
(i) First arrange the numbers vertically so that the tens' place digits and ones' place digits are lined up which means in simple one number should be written above the other number. Draw a line under the bottom number.
(ii) Add the ones place digits. Add (8 + 7 = 17). Place 7 in the ones column and place 1 above the tens column as shown.
(iii) Then add
the tens' place digits. Add (5 + 3 + 1 = 9) and place 9 in the tens column as
shown.
(iv) The answer of the sum 58 + 39 is 97.
Method II: 58 + 39
Add the ones place:
8 ones + 9 ones = 17 ones
Regroup 17 ones
17 ones = 10 ones + 7 ones
= 1 ten + 7 ones
Place 7 in the ones answer column and place 1 in the tens carryup column.
Add the tens place:
5 tens +3 tens + 1 tens = 9 tens
Place 9 in the tens answer column.
So, adding 58 + 39 = 97.
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