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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

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Example Questions

Example Question #1 : 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:

5+4=8+3

5+4=6+3

5+4=6+2

5+4=8+2

Correct answer:

5+4=6+3

Explanation:

Both 5+4 and 6+3 equal . So these two equations equal each other. 8+2=10 , 6+2= 8 , and 8+3=11 . Because none of these equations equal , they can’t be equal to 5+4 .

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Example Question #1 : 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+4=6+3

4+4=5+2

4+4=5+5

4+4=6+2

Correct answer:

4+4=6+2

Explanation:

Both 4+4 and 6+2 equal . So these two equations equal each other. 5+5=10 , 6+3=9 , and 5+2=7 . Because none of these equations equal , they can’t be equal to 4+4 .

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Example Question #2 : Working With Addition And Subtraction Equations

Which of the equations is TRUE?

Possible Answers:

3+4=5+3

3+4=5+2

3+4=5+4

3+4=5+1

Correct answer:

3+4=5+2

Explanation:

Both 3+4 and 5+2 equal . So these two equations equal each other. 5+3=8 , 5+4=9 , and 5+1=6 . Because none of these equations equal , they can’t be equal to 3+4 .

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Example Question #1 : Working With Addition And Subtraction Equations

Which of the equations is TRUE?

Possible Answers:

5+5=8+2

5+5=8+4

5+5=8+5

5+5=8+3

Correct answer:

5+5=8+2

Explanation:

Both 5+5 and 8+2 equal . So these two equations equal each other. 8+3=11 , 8+4=12 , and 8+5=13 . Because none of these equations equal , they can’t be equal to 5+5 .

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Example Question #3 : Working With Addition And Subtraction Equations

Which of the equations is TRUE?

Possible Answers:

8+5=7+8

8+5=7+6

8+5=7+7

8+5=7+9

Correct answer:

8+5=7+6

Explanation:

Both 8+5 and 7+6 equal . So these two equations equal each other. 7+7=14 , 7+8=15 , and 7+9=16 . Because none of these equations equal , they can’t be equal to 8+5 .

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Example Question #3 : Working With Addition And Subtraction Equations

Which of the equations is TRUE?

Possible Answers:

7+7=9+6

7+7-9+8

7+7=9+5

7+7=9+7

Correct answer:

7+7=9+5

Explanation:

Both 7+7 and 9+5 equal . So these two equations equal each other. 9+6=15 , 9+7=16 , and 9+8=17 . Because none of these equations equal , they can’t be equal to 7+7 .

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Example Question #4 : 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+10=5+15

7+10=5+14

7+10=5+12

7+10-5+13

Correct answer:

7+10=5+12

Explanation:

Both 7+10 and 5+12 equal . So these two equations equal each other. 5+13=18 , 5+14=19 , and 5+15=20 . Because none of these equations equal , they can’t be equal to 7+10 .

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Example Question #4 : Working With Addition And Subtraction Equations

Which of the equations is TRUE?

Possible Answers:

9+9=10+8

9+9=10+5

9+9=10+6

9+9=10+7

Correct answer:

9+9=10+8

Explanation:

Both 9+9 and 10+8 equal . So these two equations equal each other. 10+7=17 , 10+6=16 , and 10+5=15 . Because none of these equations equal , they can’t be equal to 9+9 .

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Example Question #2 : 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+8=11+3

8+8=11+7

8+8=11+4

8+8=11+5

Correct answer:

8+8=11+5

Explanation:

Both 8+8 and 11+5 equal . So these two equations equal each other. 11+4=15 , 11+3=14 , and 11+7=18 . Because none of these equations equal , they can’t be equal to 8+8 .

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Example Question #2 : 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+5=9+4

6+5=9+1

6+5=9+3

6+5=9+2

Correct answer:

6+5=9+2

Explanation:

Explanation: Both 6+5 and 9+2 equal . So these two equations equal each other. 9+3=12 , 9+4=13 , and 9+1=10 . Because none of these equations equal , they can’t be equal to 6+5 .

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

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

Example Question #2 : Working With Addition And Subtraction Equations

Example Question #1 : Working With Addition And Subtraction Equations

Example Question #3 : Working With Addition And Subtraction Equations

Example Question #3 : Working With Addition And Subtraction Equations

Example Question #4 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #4 : Working With Addition And Subtraction Equations

Example Question #2 : Understand The Equal Sign, Determine If Equations Are True Or False: Ccss.Math.Content.1.Oa.D.7

Example Question #2 : 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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