Problem 11

Merlin had 10 spell books. He gave one to Arthur and one to a knight. For his birthday, Merlin received 5 new spell books. How many does he have now?

Step 1 What does the problem ask you to find?

A. How many books did Merlin get for his birthday?

B. How many books does Merlin have?

C. How many did Merlin give away.

D. How many would he have if he did not give any away.

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Step 2 What information is needed to solve the problem?

A. The number of books he gave Arthur.

B. The number of books he gave the knight.

C. The number of books he had to start with.

D. The number of books he got for his birthday.

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Step 3 Select the correct expression.

A. 10 - 1 + 5

B. 10 - 2 + 5

C. 10 + 2 + 5

D. 10 - 2 - 5

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Step 4. Select the correct solution.

A. 14

B. 13

C. 17

D. 3

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