Common Core: 2nd Grade Math : Mentally Add and Subtract Within 20: CCSS.Math.Content.2.OA.B.2

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

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所有的共同核心:二年级的马th Resources

7 Diagnostic Tests 217 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

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Example Question #541 :How To Subtract

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start atand count back.

Example Question #432 :Operations & Algebraic Thinking

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start atand count up.

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所有的共同核心:二年级的马th Resources

7 Diagnostic Tests 217 Practice Tests Question of the Day Flashcards Learn by Concept
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