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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 #1403 : Numbers And Operations

Which of the equations is TRUE?

Possible Answers:

4+2=7-3

4+2=7-1

4+2=7-4

4+2=7-2

Correct answer:

4+2=7-1

Explanation:

Both 4+2 and 7-1 equal . So these two equations equal each other. 7-2=5 , 7-3=4 , and 7-4=3 . Because none of these equations equal , they can’t be equal to 4+2 .

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Example Question #61 : 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:

2+5=14-5

2+5=14-7

2+5=14-6

2+5=14-4

Correct answer:

2+5=14-7

Explanation:

Both 2+5 and 14-7 equal . So these two equations equal each other. 14-6=8 , 14-5=9 , and 14-4=10 . Because none of these equations equal , they can’t equal 2+5 .

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Example Question #62 : 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:

6+2=10-3

6+2=10-1

6+2=10-2

6+2=10-4

Correct answer:

6+2=10-2

Explanation:

Both 6+2 and 10-2 equal . So these two equations equal each other. 10-1=9 , 10-3=7 , and 10-4=6 . Because none of these equations equal , they can’t be equal to 6+2 .

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Example Question #63 : 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:

3+6=12-4

3+6=12-1

3+6=12-2

3+6=12-3

Correct answer:

3+6=12-3

Explanation:

Both 3+6 and 12-3 equal . So these two equations equal each other. 12-2=10 , 12-1=11 , and 12-4=8 . Because none of these equations equal , they can’t be equal to 3+6 .

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Example Question #1411 : Numbers And Operations

Which of the equations is TRUE?

Possible Answers:

7+3=12-5

7+3=12-4

7+3=12-3

7+3=12-2

Correct answer:

7+3=12-2

Explanation:

Both 7+3 and 12-2 equal . So these two equations equal each other. 12-3=9 , 12-4=8 , and 12-5=7 . Because none of these equations equal , they can’t be equal to 7+3 .

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Example Question #65 : 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+7=15-3

4+7=15-1

4+7=15-4

4+7=15-2

Correct answer:

4+7=15-4

Explanation:

Both 4+7 and 15-4 equal . So these two equations equal each other. 15-3=12 , 15-2=13 , and 15-1=14 . Because none of these equations equal , they can’t be equal to 4+7 .

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Example Question #66 : 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:

6+6=18-4

6+6=18-5

6+6=18-3

6+6=18-6

Correct answer:

6+6=18-6

Explanation:

Both 6+6 and 18-6 equal . So these two equations equal each other. 18-5=13 , 18-4=14 , and 18-3=15 . Because none of these equations equal , they can’t be equal to 6+6 .

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Example Question #67 : 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+5=17-2

8+5=17-4

8+5=17-1

8+5=17-3

Correct answer:

8+5=17-4

Explanation:

Both 8+5 and 17-4 equal . So these two equations equal each other. 17-3=14 , 17-2=15 , and 17-1=16 . Because none of these equations equal , they can’t be equal to 8+5 .

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Example Question #68 : 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:

3+11=19-3

3+11=19-5

3+11=9-2

3+11=19-4

Correct answer:

3+11=19-5

Explanation:

Both 3+11 and 19-5 equal . So these two equations equal each other. 19-4=15 , 19-3=16 , and 19-2=17 . Because none of these equations equal , they can’t be equal to 3+11 .

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Example Question #69 : 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:

7+8=20-2

7+8=20-3

7+8=20-1

7+8=20-5

Correct answer:

7+8=20-5

Explanation:

Both 7+8 and 20-5 equal . So these two equations equal each other. 20-3=17 , 20-2=18 , and 20-1=19 . Because none of these equations equal , they can’t be equal to 7+8 .

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All Common Core: 1st Grade Math Resources

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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 #1403 : Numbers And Operations

Example Question #61 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #62 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #63 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #1411 : Numbers And Operations

Example Question #65 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #66 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #67 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #68 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #69 : 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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