Common Core: 1st Grade Math : Adding and Subtracting Within 20

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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Example Questions

Example Question #178 : Operations & Algebraic Thinking

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at 17 and count back .

Example Question #179 : Operations & Algebraic Thinking

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

Example Question #180 : Operations & Algebraic Thinking

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

Example Question #631 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

Example Question #632 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

Example Question #633 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

Example Question #634 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

Example Question #635 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

Example Question #636 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

Example Question #637 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at  and count back .

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