When You Can't Take 7 from 2: Key Details

Read about subtracting with regrouping, then answer questions about the key details.

Story Brief #4

Regrouping subtraction helps us when we need to subtract larger numbers.

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⚡ The twist

Slow down. The first answer that pops up isn't always the right one.

📖 1 of 2

Regrouping subtraction helps us when we need to subtract larger numbers. Sometimes, when the top number is smaller than the bottom number in a column, we can't subtract directly. For example, in 42 - 27, we can't take 7 from 2, so we regroup.

📖 2 of 2

We borrow 1 ten from the 4 in the tens place, changing it to 3. Now, we have 12 in the ones place. So, 12 - 7 equals 5, and 3 - 2 equals 1. The answer is 15!

Question 1

1 of 2

What do we do when the top number is smaller than the bottom number in a column?

How sure are you going to be?😐 maybe

Question 2

2 of 2

In the example 42 - 27, what number do we change 4 to after regrouping?

How sure are you going to be?😐 maybe

Nice work!

You got 0 of 2 right.

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When You Can't Take 7 from 2: Key Details

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