Regrouping Tens

Regrouping Ones and Tens to Add

Open Ended

Write 483 in expanded form.

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83 + 10 = _____

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239 + 100 = ______

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704 + 10 = _____

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828 + 100 = _____

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Jacob collected 308 coins. His brother has 100 coins. How many coins do they have in all?

_____ coins

Use objects to regroup to solve

326 + 217 =

When is it necessary to regroup ones?

Why is it important to add the ones first when adding three-digit numbers?

Vera picked 456 strawberries from her farm. How many strawberries did they pick in all?

Open your textbook to page 371.

• Use base-ten blocks.

• Out library has 146 books about dogs.

• It has 145 books about cats.

• How many books about cats and dogs does the library have?

• Write the number sentence.

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436 + 245 = _____

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127 + 648 = _______

How is three-digit addition like two-digit addition?

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468 + 23 = _____

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561 + 26 = ______

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411 + 379 = _____

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There are 247 red cars. There are 438 black cars. How many red and black cars in all?

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Mr. Archer pick 416 apples last month. He picked 336 apples this month. How many apples did he pick in all?