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 you to borrow from the next column.

Tags

CCSS.7.NS.A.1C

Front

What does it mean to 'borrow' in subtraction?

Back

To 'borrow' means to take 1 from the next higher place value to help subtract a smaller digit from a larger digit in the current column.

Tags

CCSS.7.NS.A.1C

Front

What is the first step in subtracting 517 - 135?

Back

The first step is to line up the numbers by place value: 517 on top and 135 below it.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

How do you subtract the ones place in 517 - 135?

Back

In the ones place, you have 7 - 5, which equals 2.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What do you do when you can't subtract in the tens place of 517 - 135?

Back

You borrow 1 from the hundreds place, turning 1 in the hundreds into 0, and adding 10 to the 1 in the tens place, making it 11.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of subtracting the tens place in 517 - 135 after borrowing?

Back

After borrowing, you subtract 11 - 3, which equals 8.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the final step in subtracting 517 - 135?

Back

Subtract the hundreds place: 0 - 1 (after borrowing) cannot be done, so you need to borrow again, resulting in 4 - 1 = 3.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the answer to 517 - 135?

Back

The answer is 382.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the answer to 155 - 63?

Back

The answer is 92.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the answer to 1,630 - 547?

Back

The answer is 1,083.

Tags

CCSS.4.NBT.B.4