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Common Core: 1st Grade Math : Find the Missing Number in Addition and Subtraction Equations: CCSS.MATH.CONTENT.1.OA.D.8

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

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All Common Core: 1st Grade Math Resources

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Example Questions

Example Question #652 : Operations & Algebraic Thinking

Fill in the blank.

$\displaystyle 2=$ __________ $\displaystyle -13$

Possible Answers:

$\displaystyle 14$

$\displaystyle 13$

$\displaystyle 11$

$\displaystyle 12$

$\displaystyle 15$

Correct answer:

$\displaystyle 15$

Explanation:

This question is asking what we take $\displaystyle 13$ away from to get $\displaystyle 2$ .

We can add to find the missing number.

$\frac{\begin{array}[b]{r}13\\ +\ \ 2\end{array}}{ \ \ \ \space 15}$ $\displaystyle \frac{\begin{array}[b]{r}13\\ +\ \ 2\end{array}}{ \ \ \ \space 15}$

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Example Question #653 : Operations & Algebraic Thinking

Fill in the blank.

$\displaystyle 1=$ __________ $\displaystyle -10$

Possible Answers:

$\displaystyle 15$

$\displaystyle 11$

$\displaystyle 14$

$\displaystyle 12$

$\displaystyle 13$

Correct answer:

$\displaystyle 11$

Explanation:

This question is asking what we take $\displaystyle 10$ away from to get $\displaystyle 11$ .

We can add to find the missing number.

$\frac{\begin{array}[b]{r}10\\ +\ \ 1\end{array}}{ \ \ \ \space 11}$ $\displaystyle \frac{\begin{array}[b]{r}10\\ +\ \ 1\end{array}}{ \ \ \ \space 11}$

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Example Question #141 : Working With Addition And Subtraction Equations

Fill in the blank.

$\displaystyle 7+$ __________ =11 $\displaystyle =11$

Possible Answers:

$\displaystyle 4$

Correct answer:

$\displaystyle 4$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 11-7=4 $\displaystyle 11-7=4$ , which means 7+4=11 $\displaystyle 7+4=11$ .

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Example Question #142 : Working With Addition And Subtraction Equations

Fill in the blank.

$\displaystyle 8+$ __________ =20 $\displaystyle =20$

Possible Answers:

$\displaystyle 12$

Correct answer:

$\displaystyle 12$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 20-8=12 $\displaystyle 20-8=12$ , which means 8+12=20 $\displaystyle 8+12=20$ .

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Example Question #71 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

$\displaystyle 9+$ __________ =12 $\displaystyle =12$

Possible Answers:

$\displaystyle 1$

$\displaystyle 2$

$\displaystyle 4$

$\displaystyle 3$

$\displaystyle 5$

Correct answer:

$\displaystyle 3$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 12-9=3 $\displaystyle 12-9=3$ , which means 9+3=12 $\displaystyle 9+3=12$ .

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Example Question #143 : Working With Addition And Subtraction Equations

Fill in the blank.

$\displaystyle 5+$ __________ =10 $\displaystyle =10$

Possible Answers:

$\displaystyle 7$

$\displaystyle 8$

$\displaystyle 9$

$\displaystyle 5$

$\displaystyle 6$

Correct answer:

$\displaystyle 5$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 10-5=5 $\displaystyle 10-5=5$ , which means 5+5=10 $\displaystyle 5+5=10$ .

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Example Question #653 : Operations & Algebraic Thinking

Fill in the blank.

10+ $\displaystyle 10+$ __________ =14 $\displaystyle =14$

Possible Answers:

$\displaystyle 6$

$\displaystyle 5$

$\displaystyle 4$

$\displaystyle 2$

$\displaystyle 3$

Correct answer:

$\displaystyle 4$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 14-10=4 $\displaystyle 14-10=4$ , which means 10+4=14 $\displaystyle 10+4=14$ .

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Example Question #72 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

11+ $\displaystyle 11+$ __________ =16 $\displaystyle =16$

Possible Answers:

$\displaystyle 9$

$\displaystyle 7$

$\displaystyle 6$

$\displaystyle 8$

$\displaystyle 5$

Correct answer:

$\displaystyle 5$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 16-11=5 $\displaystyle 16-11=5$ , which means 11+5=16 $\displaystyle 11+5=16$ .

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Example Question #1422 : Ssat Elementary Level Quantitative (Math)

Fill in the blank.

12+ $\displaystyle 12+$ __________ =18 $\displaystyle =18$

Possible Answers:

$\displaystyle 3$

$\displaystyle 6$

$\displaystyle 4$

$\displaystyle 5$

$\displaystyle 2$

Correct answer:

$\displaystyle 6$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 18-12=6 $\displaystyle 18-12=6$ , which means 12+6=18 $\displaystyle 12+6=18$ .

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All Common Core: 1st Grade Math Resources

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Common Core: 1st Grade Math : Find the Missing Number in Addition and Subtraction Equations: CCSS.MATH.CONTENT.1.OA.D.8

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

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #652 : Operations & Algebraic Thinking

Example Question #653 : Operations & Algebraic Thinking

Example Question #141 : Working With Addition And Subtraction Equations

Example Question #142 : Working With Addition And Subtraction Equations

Example Question #71 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Example Question #143 : Working With Addition And Subtraction Equations

Example Question #653 : Operations & Algebraic Thinking

Example Question #72 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Example Question #1422 : Ssat Elementary Level Quantitative (Math)

All Common Core: 1st Grade Math Resources

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