3-Digit Subtraction with Regrouping Challenge

The video tutorial from Underwater Math explains three-digit subtraction with regrouping. It emphasizes the importance of aligning place values and demonstrates how to borrow from higher place values when subtracting. The tutorial covers regrouping in both the ones and tens places, and concludes with a simple subtraction in the hundreds place without borrowing. The video aims to help students understand the process of regrouping in subtraction problems.

What is the first step in subtraction?

• Start from the leftmost digit

• Align the numbers by their decimal

• Subtract the largest numbers first

• Begin with the ones place

Tags

CCSS.2.NBT.B.7

What do you do if you cannot subtract a smaller digit from a larger one in the ones place?

• Regroup from the tens place

• Subtract it anyway

• Skip the step

• Start over

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CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

CCSS.2.NBT.B.9

After regrouping, how many ones do you have if you borrow from the tens place?

• 10

• 13

• 4

• 3

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CCSS.2.NBT.A.1

CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

What is the result of 13 ones minus 7 ones?

• 8

• 7

• 6

• 5

Tags

CCSS.2.NBT.B.5

When regrouping in the tens place, what do you do first?

• Add to the tens

• Borrow from the hundreds

• Subtract the ones

• Multiply the tens

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CCSS.2.NBT.B.7

CCSS.2.NBT.B.9

How many tens are left after borrowing from the hundreds place?

• 13 tens

• 10 tens

• 3 tens

• 5 tens

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CCSS.2.NBT.A.1

CCSS.2.NBT.B.7

What is the result of subtracting 8 tens from 13 tens?

• 8

• 6

• 5

• 3

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CCSS.2.NBT.A.1

CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

CCSS.2.NBT.B.8

Do you need to regroup when subtracting the hundreds place in the example?

• Yes, always

• Only if it's more than 5

• Depends on the tens place

• No, not necessary

Tags

CCSS.2.NBT.B.7

What is the final step in completing the subtraction problem?

• Add all the digits

• Regroup one more time

• Subtract the hundreds place

• Check for mistakes

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CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

What is the final answer to the subtraction problem discussed?

• 256

• 365

• 452

• 143

Tags

CCSS.2.NBT.B.7

CCSS.2.OA.A.1