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 #731 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

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

Example Question #281 : Operations & Algebraic Thinking

Possible Answers:

Correct answer:

Explanation:

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

Example Question #733 : How To Subtract

Possible Answers:

Correct answer:

Explanation:

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

Example Question #291 : Operations & Algebraic Thinking

Possible Answers:

Correct answer:

Explanation:

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

Example Question #291 : Operations & Algebraic Thinking

Possible Answers:

Correct answer:

Explanation:

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

Example Question #291 : Common Core Math: Grade 1

Possible Answers:

Correct answer:

Explanation:

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

Example Question #2151 : Numbers And Operations

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at  and count up .

Example Question #2152 : Numbers And Operations

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at  and count up .

Example Question #1081 : How To Add

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at  and count up .

Example Question #2151 : Numbers And Operations

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at  and count up .

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