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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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All Common Core: 1st Grade Math Resources

7 Diagnostic Tests 180 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

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Example Question #511 : Common Core Math: Grade 1

Which of the equations is TRUE?

Possible Answers:

8-4=12-7

8-4=12-5

8-4=12-6

8-4=12-8

Correct answer:

8-4=12-8

Explanation:

Both 8-4 and 12-8 equal . So these two equations equal each other. 12-6=6 , 12-7=5 , and 12-5=7 . Because none of these equations equal , they can’t be equal to 8-4 .

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Example Question #11 : 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:

10-5=15-9

10-5=15-8

10-5=15-10

10-5=15-7

Correct answer:

10-5=15-10

Explanation:

Both 10-5 and 15-10 equal . So these two equations equal each other. 15-9=6 , 15-8=7 , and 15-7=8 . Because none of these equations equal , they can’t be equal to 10-5 .

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Example Question #11 : 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:

4-2=8-5

4-2=8-3

4-2=8-4

4-2=8-6

Correct answer:

4-2=8-6

Explanation:

Both 4-2 and 8-6 equal . So these two equations equal each other. 8-5=3 , 8-4=4 and 8-3=5 . Because one of those equations equal , they cant’ be equal to 4-2 .

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Example Question #13 : 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:

8-2=12-6

8-2=12-2

8-2=12-3

8-2=12-5

Correct answer:

8-2=12-6

Explanation:

Both 8-2 and 12-6 equal . So these two equations equal each other. 12-5=7 , 12-3=9 , and 12-2=10 . Because none of these equations equal , they can’t equal 8-2 .

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Example Question #14 : 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:

9-2=10-1

9-2=10-3

9-2=10-4

9-2=10-2

Correct answer:

9-2=10-3

Explanation:

Both 9-2 and 10-3 equal . So these two equations equal each other. 10-2=8 , 10-1=9 , and 10-4=6 . Because none of these equations equal , they can’t be equal to 9-2 .

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Example Question #15 : 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:

12-4=10-2

12-4=10-5

12-4=10-3

12-4=10-4

Correct answer:

12-4=10-2

Explanation:

Both 12-4 and 10-2 equal . So these two equations equal each other. 10-3=7 , 10-4=6 , and 10-5=5 . Because none of these equations equal , they can’t be equal to 12-4 .

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Example Question #16 : 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:

12-3=10-1

12-3=10-2

12-3=10-4

12-3=10-3

Correct answer:

12-3=10-1

Explanation:

Both 12-3 and 10-1 equal . So these two equations equal each other. 10-2=8 , 10-3=7 , and 10-6=4 . Because none of these equations equal , they can’t be equal to 12-3 .

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Example Question #17 : 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:

20-10=15-2

20-10=15-4

20-10=15-3

20-10=15-5

Correct answer:

20-10=15-5

Explanation:

Both 20-10 and 15-5 equal . So these two equations equal each other. 15-4=11 , 15-3=12 , 15-2=13 . Because none of these equations equal , they can’t be equal to 20-10 .

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Example Question #18 : 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:

15-4=14-3

15-4=17-5

15-4=17-4

15-4=17-6

Correct answer:

15-4=17-6

Explanation:

Both 15-4 and 17-6 equal . So these two equations equal each other. 17-5=12 , 17-4=13 , and 17-3=14 . Because none of these equations equal , they can’t be equal to 15-4 .

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Example Question #19 : 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:

14-2=15-3

14-2=15-1

14-2=15-4

14-2=15-2

Correct answer:

14-2=15-3

Explanation:

Both 14-2 and 15-2 equal . So these two equations equal each other. 15-2=13 , 15-1=14 , and 14-5=11 . Because none of these equations equal , they can’t be equal to 12-2 .

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

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

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #511 : Common Core Math: Grade 1

Example Question #11 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #11 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #13 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #14 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #15 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #16 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #17 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #18 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #19 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

All Common Core: 1st Grade Math Resources

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