3-Digit Add and Subtract with Regrouping

Front

What is regrouping in addition?

Back

Regrouping in addition is when you combine groups of ten to make a larger number. For example, if you add 27 + 35, you can regroup the tens to make it easier.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is regrouping in subtraction?

Back

Regrouping in subtraction is when you borrow from a higher place value to subtract a smaller number. For example, in 52 - 27, you would borrow from the 5 to subtract 2 from 12.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the sum of 245 and 378?

Back

The sum of 245 and 378 is 623.

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the difference when you subtract 145 from 300?

Back

The difference when you subtract 145 from 300 is 155.

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

How do you add 456 and 289 using regrouping?

Back

First, add the ones: 6 + 9 = 15 (write down 5, carry over 1). Then add the tens: 5 + 8 + 1 = 14 (write down 4, carry over 1). Finally, add the hundreds: 4 + 2 + 1 = 7. The answer is 745.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

How do you subtract 512 from 700 using regrouping?

Back

First, you can't subtract 2 from 0, so you borrow from the 7 (making it 6) and turn the 0 into 10. Now, 10 - 2 = 8. Next, 6 - 1 = 5. Finally, 6 - 5 = 1. The answer is 188.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is a three-digit number?

Back

A three-digit number is a number that has three places: hundreds, tens, and ones. For example, 245 is a three-digit number.

Tags

CCSS.2.NBT.A.3

Front

What does the term 'sum' mean?

Back

The term 'sum' means the result of adding two or more numbers together.

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CCSS.5.OA.A.1

CCSS.5.OA.A.2

Front

What does the term 'difference' mean?

Back

The term 'difference' means the result of subtracting one number from another.

Tags

CCSS.5.NBT.B.7

Front

What is the first step in adding 3-digit numbers?

Back

The first step in adding 3-digit numbers is to line up the numbers by their place values: hundreds, tens, and ones.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2