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Regrouping with Base 10
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Name:Date:
Regrouping with Base 10
Use hundreds, tens and ones to work out each answer. Show your regrouping where asked.
Add by regrouping
1.Work out 236 + 187. Show how you regroup the ones and tens.
2.Add 358 and 264. Record the total.
3.Which addition calculations need regrouping in at least one place? Select all that apply.
- 142 + 236
- 157 + 126
- 281 + 407
- 268 + 175
4.At a recycling drive, Dylan collected 176 cans on Saturday and 248 cans on Sunday. How many cans did he collect altogether?
Hundreds
Tens
Ones
___
___
___
5.Write 307 in the place-value chart above. How many hundreds, tens and ones does it contain?
Subtract by regrouping
6.Calculate 583 − 247. Show the exchanges you make.
7.Find the difference between 702 and 368.
8.Choose the best reason for regrouping in a subtraction calculation.
- A place in the top number has fewer units than the matching place in the number being subtracted.
- The top number is always even.
- The two numbers have the same hundreds digit.
- Regrouping is only used when adding.
9.Tahnee sorted 436 bottles for recycling. The collection took away 178 bottles. How many bottles remained?
10.Match each calculation with its answer.
- 425 − 168
- 364 + 278
- 519 − 284
- 186 + 395
- 581
- 642
- 235
- 257
Explain your thinking
11.In your own words, explain what regrouping does to the value of digits when adding or subtracting.
12.For 400 − 157, explain why you need to regroup and give the answer.
3 printable pages
Page 1
Page 2
Page 3
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