Two-Digit Subtraction with Regrouping

Front

What is two-digit subtraction with regrouping?

Back

Two-digit subtraction with regrouping is a method used to subtract numbers where borrowing is necessary, typically when the digit in the minuend (the top number) is smaller than the digit in the subtrahend (the bottom number) in any given place value.

Tags

CCSS.7.NS.A.1C

Front

How do you perform subtraction with regrouping?

Back

To perform subtraction with regrouping, start from the rightmost digit. If the top digit is smaller than the bottom digit, borrow 1 from the next left digit, reducing it by 1 and adding 10 to the current digit. Then, subtract as usual.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of 64 - 26?

Back

The result of 64 - 26 is 38.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of 97 - 86?

Back

The result of 97 - 86 is 11.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

If Pop has 25 posters and buys 15 more, how many does he have before giving any away?

Back

Before giving any away, Pop has 25 + 15 = 40 posters.

Tags

CCSS.2.OA.A.1

Front

After giving away 13 posters, how many does Pop have left?

Back

After giving away 13 posters, Pop has 40 - 13 = 27 posters left.

Tags

CCSS.2.OA.A.1

Front

If Bob had 79 blocks and let his brother play with 54, how many blocks does Bob have now?

Back

Bob has 79 - 54 = 25 blocks now.

Tags

CCSS.2.NBT.B.7

Front

What is the total number of plates Tim washed if he put 58 plates through the dishwasher and 29 of them a second time?

Back

Tim washed a total of 58 plates, but only 29 needed to be washed a second time.

Tags

CCSS.3.OA.D.8

Front

What does it mean to 'regroup' in subtraction?

Back

Regrouping in subtraction means borrowing from the next higher place value when the digit in the minuend is smaller than the digit in the subtrahend.

Tags

CCSS.7.NS.A.1C

Front

Why is it important to understand regrouping in subtraction?

Back

Understanding regrouping is important because it allows for accurate subtraction of larger numbers, ensuring that calculations are correct even when borrowing is necessary.

Tags

CCSS.2.NBT.B.5