Common Core: 1st Grade Math : Working with Addition and Subtraction Equations

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

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例子问题ns

例子问题n #71 :Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Which of the equations is TRUE?

Possible Answers:

Correct answer:

Explanation:

Bothandequal. So these two equations equal each other.,, and. Because none of these equations equal, they can’t be equal to.

例子问题n #71 :Working With Addition And Subtraction Equations

Which of the equations is TRUE?

Possible Answers:

Correct answer:

Explanation:

Bothandequal. So these two equations equal each other.,, andBecause none of these equations equal, they can’t be equal to.

例子问题n #1 :Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

__________

Possible Answers:

Correct answer:

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number., which means.

例子问题n #1 :Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

__________

Possible Answers:

Correct answer:

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number., which means.

例子问题n #3 :Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

__________

Possible Answers:

Correct answer:

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number., which means.

例子问题n #4 :Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

__________

Possible Answers:

Correct answer:

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number., which means.

例子问题n #5 :Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

__________

Possible Answers:

Correct answer:

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number., which means.

例子问题n #6 :Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

__________

Possible Answers:

Correct answer:

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number., which means.

例子问题n #7 :Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

__________

Possible Answers:

Correct answer:

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number., which means.

例子问题n #8 :Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

__________

Possible Answers:

Correct answer:

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number., which means.

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