2 digit subtraction with regrouping

Front

What is regrouping in subtraction?

Back

Regrouping in subtraction is when you borrow from the next higher place value to help subtract when the top digit is smaller than the bottom digit.

Tags

CCSS.7.NS.A.1C

Front

How do you subtract 2-digit numbers?

Back

To subtract 2-digit numbers, align the numbers by place value, subtract the ones place first, and if needed, regroup from the tens place.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of 72 - 42?

Back

30

Tags

CCSS.7.NS.A.1C

Front

What is the result of 33 - 28?

Back

5

Tags

CCSS.2.OA.A.1

Front

What is the result of 36 - 18?

Back

18

Tags

CCSS.2.OA.A.1

Front

What is the result of 54 - 17?

Back

37

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of 43 - 19?

Back

24

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

What do you do if the top digit is smaller than the bottom digit in the ones place?

Back

You need to regroup by borrowing 1 from the tens place.

Tags

CCSS.2.NBT.B.7

Front

What is the first step in subtracting 54 - 17?

Back

Align the numbers by place value: 54 on top and 17 below.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What does it mean to borrow in subtraction?

Back

To borrow means to take 1 from the next higher place value to make the top digit larger for subtraction.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2