Addition And Subtraction With Regrouping Worksheets

Regrouping is a strategy used in math to make adding and subtracting easier. Here’s how it works:

Addition with Regrouping:

Let’s take an example: 78 + 47

1. Write the numbers vertically, one below the other:

78
+47
---

2. Add the numbers in the ones column (rightmost column). Here, it’s 8 + 7. But that equals 15, which is a two-digit number. We can only write one digit in each column, so we “regroup” by moving the tens digit of the 15 (which is 1) over to the tens column.

78
+47
---
 15

3. Now, rewrite the equation, putting the “1” in the tens column:

 1
78
+47
---

4. Add the numbers in the tens column (remember to include the 1 you regrouped!). Here, it’s 7 + 4 + 1 = 12

 1
78
+47
---
125

So, 78 + 47 equals 125. That’s addition with regrouping!

Subtraction with Regrouping:

Let’s take an example: 82 – 57

1. Write the numbers vertically, one below the other:

82
-57
---

2. Start with the ones column. Here, it’s 2 – 7. But you can’t take 7 away from 2, so you have to “regroup”. You take a 1 from the tens column of 82, which makes it 72, and add that 1 to the ones column, making it 12.

72
-57
---

3. Now you can subtract in the ones column: 12 – 7 = 5

72
-57
---
 5

4. And then subtract in the tens column: 7 – 5 = 2

72
-57
---
25

So, 82 – 57 equals 25. That’s subtraction with regrouping!

On your worksheets, you’ll be given numbers to add or subtract using this method of regrouping. Remember, practice makes perfect! So, keep practicing and you’ll get the hang of it.