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Common Core: 2nd Grade Math : Mentally Add and Subtract Within 20: CCSS.Math.Content.2.OA.B.2

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 #171 : How To Subtract

$\frac{\begin{array}[b]{r}16\\ -\ 4\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

16, 15, 14, 13, 12

$\frac{\begin{array}[b]{r}16\\ -\ 4\end{array}}{ \ \ \space 12}$

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Example Question #172 : How To Subtract

$\frac{\begin{array}[b]{r}15\\ -\ 3\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

15, 14, 13, 12

$\frac{\begin{array}[b]{r}15\\ -\ 3\end{array}}{ \ \ \ \space 12}$

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Example Question #173 : How To Subtract

$\frac{\begin{array}[b]{r}14\\ -\ 4\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

14, 13, 12, 11, 10

$\frac{\begin{array}[b]{r}14\\ -\ 4\end{array}}{ \ \ \space 10}$

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Example Question #391 : Ssat Elementary Level Quantitative (Math)

$\frac{\begin{array}[b]{r}13\\ -\ 7\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

13, 12, 11, 10, 9, 8, 7, 6

$\frac{\begin{array}[b]{r}13\\ -\ 7\end{array}}{ \ \ \ \space 6}$

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Example Question #392 : Ssat Elementary Level Quantitative (Math)

$\frac{\begin{array}[b]{r}12\\ -\ 11\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1

$\frac{\begin{array}[b]{r}12\\ -\ 11\end{array}}{ \ \ \ \ \ \space 1}$

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Example Question #171 : Operations

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

Possible Answers:

Correct answer:

Explanation:

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

10, 9, 8, 7, 6, 5, 4, 3, 2

$\frac{\begin{array}[b]{r}10\\ -\ 8\end{array}}{ \ \ \ \space 2}$

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Example Question #172 : Operations

$\frac{\begin{array}[b]{r}9\\ -\ 6\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

9, 8, 7, 6

$\frac{\begin{array}[b]{r}9\\ -\ 6\end{array}}{ \ \ \ \space 3}$

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Example Question #181 : Operations

$\frac{\begin{array}[b]{r}7\\ -\ 1\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

7,6

$\frac{\begin{array}[b]{r}7\\ -\ 1\end{array}}{ \ \ \ \space 6}$

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Example Question #182 : How To Subtract

$\frac{\begin{array}[b]{r}20\\ -\ 3\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

20,19,18,17

$\frac{\begin{array}[b]{r}20\\ -\ 3\end{array}}{ \ \ \space 17}$

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Example Question #91 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}20\\ -\ 19\end{array}}{ \ \ \ \space ?}$

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, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1

$\frac{\begin{array}[b]{r}20\\ -\ 19\end{array}}{ \ \ \ \ \ \space 1}$

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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 : Mentally Add and Subtract Within 20: CCSS.Math.Content.2.OA.B.2

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

All Common Core: 2nd Grade Math Resources

Example Questions

Example Question #171 : How To Subtract

Example Question #172 : How To Subtract

Example Question #173 : How To Subtract

Example Question #391 : Ssat Elementary Level Quantitative (Math)

Example Question #392 : Ssat Elementary Level Quantitative (Math)

Example Question #171 : Operations

Example Question #172 : Operations

Example Question #181 : Operations

Example Question #182 : How To Subtract

Example Question #91 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

All Common Core: 2nd Grade Math Resources

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