Subtraction with Regrouping

Front

What is subtraction with regrouping?

Back

Subtraction with regrouping is a method used to subtract numbers when the top digit is smaller than the bottom digit in any column, requiring borrowing from the next left column.

Tags

CCSS.7.NS.A.1C

Front

How do you regroup in subtraction?

Back

To regroup, you borrow 1 from the next left column, which adds 10 to the current column, allowing you to subtract.

Tags

CCSS.7.NS.A.1C

Front

What is the first step in subtracting 54 from 82 using regrouping?

Back

The first step is to look at the ones place: you cannot subtract 4 from 2, so you need to regroup.

Tags

CCSS.7.NS.A.1C

Front

If you have 82 and need to subtract 54, what do you do after regrouping?

Back

After regrouping, you will have 72 in the ones place and can now subtract 4 from 12.

Tags

CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

Front

What is the result of 82 - 54?

Back

The result is 28.

Tags

CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

Front

When subtracting 73 - 29, what do you do in the ones place?

Back

You cannot subtract 9 from 3, so you need to regroup from the tens place.

Tags

CCSS.2.NBT.B.6

Front

What is the result of 73 - 29 after regrouping?

Back

The result is 44.

Tags

CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

Front

What does it mean to borrow in subtraction?

Back

Borrowing means taking 1 from the next left column to help subtract when the top digit is smaller than the bottom digit.

Tags

CCSS.7.NS.A.1C

Front

If you have 100 - 37, how do you start?

Back

You start by looking at the ones place: you cannot subtract 7 from 0, so you need to regroup.

Tags

CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

Front

What is the result of 100 - 37 after regrouping?

Back

The result is 63.