Addition of One to Two-digit Numbers without Regrouping
In this module we will discuss one to two -digit numbers addition without regrouping.
Addition without regrouping is when the digits add up to a number that is 9 or less. The answer can simply written below each place column.
In adding numbers with digits less than ten, add from the right going to the left. Start from the ones digit, and then the tens digit.
Example:
Addition of two addends:
4 7 step 1: 7 ones + 2 ones = 9 ones
+ 4 2 step 2: 4 tens + 4 tens = 8 tens or 80
8 9 step 3: 8 tens and 9 ones + 80 + 9
Addition of three addends:
53
12
+ 21
86
Start from the ones digit, and then the tens digit.
