Subtraction with Regrouping

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another. It shows how many are left after some have been taken away.

Tags

CCSS.2.NBT.B.7

Front

What does regrouping mean in subtraction?

Back

Regrouping in subtraction means rearranging the numbers to make it easier to subtract, especially when the top number is smaller than the bottom number in a column.

Tags

CCSS.7.NS.A.1C

Front

Solve: 80 - 49

Back

31

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

Solve: 64 - 19

Back

45

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

Solve: 25 - 7

Back

18

Tags

CCSS.2.OA.A.1

Front

Solve: 90 - 56

Back

34

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

Solve: 86 - 42

Back

44

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the first step in subtraction with regrouping?

Back

The first step is to look at the digits in each column, starting from the right.

Tags

CCSS.7.NS.A.1C

Front

Why do we need to borrow in subtraction?

Back

We need to borrow when the top digit is smaller than the bottom digit in a column, so we can regroup and make the subtraction possible.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of subtracting a larger number from a smaller number?

Back

The result is a negative number, which shows that you cannot take away more than you have.

Tags

CCSS.7.NS.A.1C