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Common Core: 2nd Grade Math : Operations & Algebraic Thinking

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

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All Common Core: 2nd Grade Math Resources

7 Diagnostic Tests 217 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #101 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}19\\ -\ 7\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

19, 18, 17, 16, 15, 14, 13, 12

$\frac{\begin{array}[b]{r}19\\ -\ 7\end{array}}{ \ \ \space 12}$

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Example Question #102 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}19\\ -\ 19\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0

$\frac{\begin{array}[b]{r}19\\ -\ 19\end{array}}{ \ \ \ \space 0}$

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Example Question #103 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}18\\ -\ 8\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

18, 17, 16, 15, 14, 13, 12, 11, 10

$\frac{\begin{array}[b]{r}18\\ -\ 8\end{array}}{ \ \ \space 10}$

Report an Error

Example Question #104 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}17\\ -\ 4\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

17, 16, 15, 14, 13

$\frac{\begin{array}[b]{r}17\\ -\ 4\end{array}}{ \ \ \space 13}$

Report an Error

Example Question #181 : How To Subtract

$\frac{\begin{array}[b]{r}16\\ -\ 9\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

16, 15, 14, 13, 12, 11, 10, 9, 8, 7

$\frac{\begin{array}[b]{r}16\\ -\ 9\end{array}}{ \ \ \ \space 7}$

Report an Error

Example Question #106 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}15\\ -\ 8\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

15, 14, 13, 12, 11, 10, 9, 8, 7

$\frac{\begin{array}[b]{r}15\\ -\ 8\end{array}}{ \ \ \ \space 7}$

Report an Error

Example Question #107 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}14\\ -\ 3\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

14,13,12,11

$\frac{\begin{array}[b]{r}14\\ -\ 3\end{array}}{ \ \ \space 11}$

Report an Error

Example Question #401 : Ssat Elementary Level Quantitative (Math)

$\frac{\begin{array}[b]{r}20\\ -\ 8\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

20, 19, 18, 17, 16, 15, 14, 13, 12

$\frac{\begin{array}[b]{r}20\\ -\ 8\end{array}}{ \ \ \space 12}$

Report an Error

Example Question #192 : Operations

$\frac{\begin{array}[b]{r}19\\ -\ 9\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

19, 18, 17, 16, 15, 14, 13, 12, 11, 10

$\frac{\begin{array}[b]{r}19\\ -\ 9\end{array}}{ \ \ \space 10}$

Report an Error

Example Question #101 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}18\\ -\ 1\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

18, 17

$\frac{\begin{array}[b]{r}18\\ -\ 1\end{array}}{ \ \ \space17}$

Report an Error

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All Common Core: 2nd Grade Math Resources

7 Diagnostic Tests 217 Practice Tests Question of the Day Flashcards Learn by Concept

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Common Core: 2nd Grade Math : Operations & Algebraic Thinking

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

All Common Core: 2nd Grade Math Resources

Example Questions

Example Question #101 : Operations & Algebraic Thinking

Example Question #102 : Operations & Algebraic Thinking

Example Question #103 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #104 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #181 : How To Subtract

Example Question #106 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #107 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #401 : Ssat Elementary Level Quantitative (Math)

Example Question #192 : Operations

Example Question #101 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

All Common Core: 2nd Grade Math Resources

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