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Three-Digit Subtraction Regrouping

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Three-Digit Subtraction Regrouping

Subtract the ones, tens and hundreds. If a digit is too small, exchange 1 from the next place: 1 ten is 10 ones, and 1 hundred is 10 tens.

Subtract with regrouping

Show your working for each calculation.

1.Calculate 631 − 258.

2.Calculate 804 − 367.

3.Calculate 752 − 486.

4.Calculate 920 − 574.

Think about regrouping

5.In 642 − 175, which place values need regrouping? Choose all that apply.

Ones
Tens
Hundreds
No place values

6.In 534 − 178, the ones are regrouped first. What does the 3 in the tens place become?

7.Explain why you need to regroup to work out 401 − 236.

Check and apply your subtraction

8.Work out 723 − 386. Then estimate by rounding each number to the nearest hundred. Is your answer close to your estimate?

9.A wildlife sanctuary had 583 kg of feed in storage. After 246 kg was used, how many kilograms remained?

10.Matilda counted 946 native-animal information cards at the sanctuary. Cooper packed 328 for an event on Monday and 157 more on Tuesday. How many cards were not packed?