Add and Subtract Whole Numbers with Regrouping

Estimate the answer to:

906 + 397

• 1300

• 1200

• 1310

• 1303

Estimate the answer to:

1965 - 370

• 1600

• 1500

• 1595

• 2400

68 - 39

• 30

• 28

• 31

• 29

100 - 36

• 44

• 54

• 74

• 64

500-44

• 456

• 461

• 608

• 773

Addends can be regrouped and the sum remains the same because of the __________.

• Identity Property of Addition

• Commutative Property of Addition

• Associative Property of Addition

• estimate

When you are __________ numbers, you are naming whole numbers in a different way.

• digit

• inverse operations

• estimate

• regrouping

Lynn has 43 books in her collection. She lent out 18 books. How many books are left? 

• add

• subtract

What addition strategy does the picture show?

• Adding Using Partial Sums

• Adding Using Hundred Chart

• Adding Using Number Lines

• Adding Traditionally

Tom has 175 baseball cards. His uncle gives him 67 more baseball cards. How many does he have now?

Is this addition or subtraction?

• Addition

• Subtraction