Here we will learn 2-digit numbers subtraction using expanded form.
Express each number in expanded form, then subtract the ones and tens place.
Let's try to solve the following example:
Subtraction of 2-Digit Numbers with Regrouping:
1. Subtract 45 from 72.
Solution:
First we need to express the number 45 and 72 in expanded form.
Expanded form of 45
45 = 4 tens + 5 ones
and
Expanded form of 72
72 = 7 tens + 2 ones
Now we subtract the expanded form of 72 and 45:
72 = 7 tens + 2 ones = 6 tens + 12 ones
- 45 = - 4 tens + 5 ones = - 4 tens + 5 ones
Difference = 2 tens + 7 ones = 27
Therefore, 72 - 45 = 27
Note: Since in ones place 5 is greater than 2 so, we regroup 7 tens + 2 ones to 6 tens 12 ones.
2. Subtract 29 from 57.
Solution:
First we need to express the number 29 and 57 in expanded form.
Expanded form of 29
29 = 2 tens + 9 ones
and
Expanded form of 57
57 = 5 tens + 7 ones
Now we subtract the expanded form of 57 and 29:
57 = 5 tens + 7 ones = 4 tens + 17 ones
- 29 = - 2 tens + 9 ones = - 2 tens + 9 ones
Difference = 2 tens + 8 ones = 28
Therefore, 57 - 29 = 28
Note: Since in ones place 9 is greater than 7 so, we regroup 5 tens + 7 ones to 4 tens 17 ones.
3. Subtract 35 from 81.
Solution:
First we need to express the number 35 and 81 in expanded form.
Expanded form of 35
35 = 3 tens + 5 ones
and
Expanded form of 81
81 = 8 tens + 1 one
Now we subtract the expanded form of 81 and 35:
81 = 8 tens + 1 one = 7 tens + 11 ones
- 35 = - 3 tens + 5 ones = - 3 tens + 5 ones
Difference = 4 tens + 6 ones = 46
Therefore, 81 - 35 = 46
Note: Since in ones place 5 is greater than 1 so, we regroup 8 tens + 1 ones to 7 tens 11 ones.
From 2-Digit Numbers Subtraction using Expanded Form to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.
Oct 08, 24 10:53 AM
Oct 07, 24 04:07 PM
Oct 07, 24 03:29 PM
Oct 07, 24 03:13 PM
Oct 07, 24 12:01 PM
New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.