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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

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Example Questions

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

Fill in the blank.

$\displaystyle 1+$ __________ = 5 $\displaystyle = 5$

Possible Answers:

$\displaystyle 1$

$\displaystyle 0$

$\displaystyle 4$

$\displaystyle 2$

$\displaystyle 3$

Correct answer:

$\displaystyle 4$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 5-1=4 $\displaystyle 5-1=4$ , which means 1+4=5 $\displaystyle 1+4=5$ .

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Example Question #2 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

$\displaystyle 2+$ __________ =20 $\displaystyle =20$

Possible Answers:

$\displaystyle 16$

$\displaystyle 15$

$\displaystyle 17$

$\displaystyle 19$

$\displaystyle 18$

Correct answer:

$\displaystyle 18$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 20-2=18 $\displaystyle 20-2=18$ , which means 2+18=20 $\displaystyle 2+18=20$ .

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Example Question #2 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

$\displaystyle 3+$ __________ =19 $\displaystyle =19$

Possible Answers:

$\displaystyle 16$

$\displaystyle 15$

$\displaystyle 14$

$\displaystyle 17$

$\displaystyle 18$

Correct answer:

$\displaystyle 16$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 19-3=16 $\displaystyle 19-3=16$ , which means 3+16=19 $\displaystyle 3+16=19$ .

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Example Question #1452 : Numbers And Operations

Fill in the blank.

$\displaystyle 5+$ __________ $\displaystyle =9$

Possible Answers:

$\displaystyle 3$

$\displaystyle 2$

$\displaystyle 4$

$\displaystyle 1$

$\displaystyle 5$

Correct answer:

$\displaystyle 4$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 9-5=4 $\displaystyle 9-5=4$ , which means 5+4=9 $\displaystyle 5+4=9$ .

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Example Question #1453 : Numbers And Operations

Fill in the blank.

$\displaystyle 7+$ __________ $\displaystyle =19$

Possible Answers:

$\displaystyle 15$

$\displaystyle 13$

$\displaystyle 16$

$\displaystyle 12$

$\displaystyle 14$

Correct answer:

$\displaystyle 12$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 19-7=12 $\displaystyle 19-7=12$ , which means 7+12=19 $\displaystyle 7+12=19$ .

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Example Question #2 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

10+ $\displaystyle 10+$ __________ =16 $\displaystyle =16$

Possible Answers:

$\displaystyle 9$

$\displaystyle 8$

$\displaystyle 6$

$\displaystyle 5$

$\displaystyle 7$

Correct answer:

$\displaystyle 6$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 16-10=6 $\displaystyle 16-10=6$ , which means 10+6=16 $\displaystyle 10+6=16$ .

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Example Question #7 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

12+ $\displaystyle 12+$ __________ =15 $\displaystyle =15$

Possible Answers:

$\displaystyle 2$

$\displaystyle 6$

$\displaystyle 3$

$\displaystyle 5$

$\displaystyle 4$

Correct answer:

$\displaystyle 3$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 15-12=3 $\displaystyle 15-12=3$ , which means 12+3=15 $\displaystyle 12+3=15$ .

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

Fill in the blank.

13+ $\displaystyle 13+$ __________ =20 $\displaystyle =20$

Possible Answers:

$\displaystyle 11$

$\displaystyle 9$

$\displaystyle 7$

$\displaystyle 8$

$\displaystyle 10$

Correct answer:

$\displaystyle 7$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 20-13=7 $\displaystyle 20-13=7$ , which means 13+7=20 $\displaystyle 13+7=20$ .

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Example Question #9 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

15+ $\displaystyle 15+$ __________ =16 $\displaystyle =16$

Possible Answers:

$\displaystyle 1$

$\displaystyle 2$

$\displaystyle 0$

$\displaystyle 4$

$\displaystyle 3$

Correct answer:

$\displaystyle 1$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 16-15=1 $\displaystyle 16-15=1$ , which means 15+1=16 $\displaystyle 15+1=16$ .

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Example Question #10 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank.

17+ $\displaystyle 17+$ __________ =19 $\displaystyle =19$

Possible Answers:

$\displaystyle 2$

$\displaystyle 3$

$\displaystyle 4$

$\displaystyle 5$

$\displaystyle 1$

Correct answer:

$\displaystyle 2$

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. 19-17=2 $\displaystyle 19-17=2$ , which means 17+2=19 $\displaystyle 17+2=19$ .

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

Example Question #2 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Example Question #2 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Example Question #1452 : Numbers And Operations

Example Question #1453 : Numbers And Operations

Example Question #2 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Example Question #7 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

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

Example Question #9 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Example Question #10 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

All Common Core: 1st Grade Math Resources

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