Subtract 27 from 64. Show your work.

64 - 27 = 37. To solve, regroup 1 ten from 6 tens, making it 5 tens and adding 10 ones to 4 ones, making it 14 ones. Then, 14 - 7 = 7 ones. Finally, 5 tens - 2 tens = 3 tens. The answer is 37.

Explain the first step of regrouping when you are trying to calculate 51 - 36.

The first step is to look at the ones place. Since you cannot subtract 6 from 1, you need to regroup. You take 1 ten from the 5 tens, leaving 4 tens. That 1 ten is then added to the 1 one, making it 11 ones.

Solve 80 - 34. Show your work.

80 - 34 = 46. Regroup 1 ten from 8 tens, making it 7 tens and 10 ones. Then, 10 - 4 = 6 ones. Finally, 7 tens - 3 tens = 4 tens. The answer is 46.

A baker made 72 cookies and sold 48 of them. How many cookies does the baker have left? Show how you use regrouping to find your answer.

The baker has 24 cookies left. To find this, calculate 72 - 48. In the ones place, you cannot subtract 8 from 2, so regroup 1 ten from 7 tens (leaving 6 tens) and add it to 2 ones (making 12 ones). Then, 12 - 8 = 4 ones. In the tens place, 6 tens - 4 tens = 2 tens. So, 24 cookies are left.

Which of the following statements correctly describes regrouping in subtraction?

Regrouping involves taking a ten from the tens place and adding its value as ten ones to the ones place.

Two-Digit Subtraction with Regrouping

Grade 9th Grade · Math · 45 min

What's Included

Learning Objective

I can subtract two-digit numbers with regrouping.

Warm-Up Video

Khan Academy · 5:26

Subtracting with regrouping (borrowing) | Early Math | Khan Academy

Guided Notes

3 key concepts

1
When subtracting two-digit numbers, you first look at the ones place, and if the top digit is smaller than the bottom digit, you need to regroup.
2
Regrouping involves taking one ten from the tens place and adding ten ones to the ones place.
3
For example, 83 can be thought of as seven tens and thirteen ones after regrouping, which allows you to subtract in the ones place.

Practice Questions

10 questions · Multiple choice & Short answer

Exit Ticket

Quick comprehension check

“Subtract 37 from 74. Show all steps, including how you regroup.”

Complete Lesson Package

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Two-Digit Subtraction with Regrouping

What's Included

Learning Objective

Warm-Up Video

Guided Notes

Practice Questions

Exit Ticket

Complete Lesson Package

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