Addition and Subtraction Models

Is this bar model addition or subtraction?

• addition

• subtraction

Is this an addition problem or a subtraction problem?

• addition

• subtraction

What number goes first when solving this problem?

• 280

• 98

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

Solve:
246 + 553 = ?

• 313

• 799

• 809

• 307

Can you make a new 10? What is the sum of the model?

• Yes, 45 + 27 = 72

• No, 45 + 27 = 62

• Yes, 45 + 27 = 62

• No, 45 + 27 = 72

Juan has 253 marbles. Ella has 38 more marbles than Juan. How many marbles does Ella have? Ella has _____ marbles.

Use mental math to solve.

120 + 42 + 80

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Is this bar model addition or subtraction?

• addition

• subtraction

What number would you put first when setting up your number sentence?

• 137

• 272