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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 #192 : Operations

$\frac{\begin{array}[b]{r}18\\ -\ 9\end{array}}{ \ \ \ \space ?}$

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, 9

$\frac{\begin{array}[b]{r}18\\ -\ 9\end{array}}{ \ \ \ \space 9}$

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Example Question #111 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}17\\ -\ 6\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at 17 and count back .

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

$\frac{\begin{array}[b]{r}17\\ -\ 6\end{array}}{ \ \ \space 11}$

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Example Question #193 : How To Subtract

$\frac{\begin{array}[b]{r}16\\ -\ 2\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

16, 15, 14

$\frac{\begin{array}[b]{r}16\\ -\ 2\end{array}}{ \ \ \space 14}$

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Example Question #194 : How To Subtract

$\frac{\begin{array}[b]{r}15\\ -\ 5\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

15, 14, 13, 12, 11, 10

$\frac{\begin{array}[b]{r}15\\ -\ 5\end{array}}{ \ \ \space 10}$

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Example Question #193 : Operations

$\frac{\begin{array}[b]{r}13\\ -\ 3\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

13,12,11,10

$\frac{\begin{array}[b]{r}13\\ -\ 3\end{array}}{ \ \ \space 10}$

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Example Question #196 : How To Subtract

$\frac{\begin{array}[b]{r}11\\ -\ 5\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

11, 10, 9, 8, 7, 6

$\frac{\begin{array}[b]{r}11\\ -\ 5\end{array}}{ \ \ \ \space 6}$

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Example Question #197 : How To Subtract

$\frac{\begin{array}[b]{r}9\\ -\ 4\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

9,8,7,6,5

$\frac{\begin{array}[b]{r}9\\ -\ 4\end{array}}{ \ \ \ \space 5}$

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Example Question #201 : How To Subtract

$\frac{\begin{array}[b]{r}7\\ -\ 4\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

7,6,5,4,3

$\frac{\begin{array}[b]{r}7\\ -\ 4\end{array}}{ \ \ \ \space 3}$

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Example Question #202 : How To Subtract

$\frac{\begin{array}[b]{r}14\\ -\ 6\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}14\\ -\ 6\end{array}}{ \ \ \ \space 8}$

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Example Question #203 : How To Subtract

$\frac{\begin{array}[b]{r}20\\ -\ 9\end{array}}{ \ \ \ \space ?}$

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

$\frac{\begin{array}[b]{r}20\\ -\ 9\end{array}}{ \ \ \space11}$

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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 #192 : Operations

Example Question #111 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #193 : How To Subtract

Example Question #194 : How To Subtract

Example Question #193 : Operations

Example Question #196 : How To Subtract

Example Question #197 : How To Subtract

Example Question #201 : How To Subtract

Example Question #202 : How To Subtract

Example Question #203 : How To Subtract

All Common Core: 2nd Grade Math Resources

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