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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 #481 : Numbers And Operations

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

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, 8, 7, 6, 5, 4, 3, 2, 1, 0

$\frac{\begin{array}[b]{r}18\\ -\ 18\end{array}}{ \ \ \ \ \ \space 0}$

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Example Question #182 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}17\\ -\ 15\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}17\\ -\ 15\end{array}}{ \ \ \ \ \space 2}$

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Example Question #1831 : Common Core Math: Grade 2

$\frac{\begin{array}[b]{r}16\\ -\ 11\end{array}}{ \ \ \ \space ?}$

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, 6, 5

$\frac{\begin{array}[b]{r}16\\ -\ 11\end{array}}{ \ \ \ \ \space 5}$

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Example Question #184 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}15\\ -\ 13\end{array}}{ \ \ \ \space ?}$

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, 6, 5, 4, 3, 2

$\frac{\begin{array}[b]{r}15\\ -\ 13\end{array}}{ \ \ \ \ \ \space 2}$

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Example Question #181 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}14\\ -\ 1\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

14,13

$\frac{\begin{array}[b]{r}14\\ -\ 1\end{array}}{ \ \ \ \space 13}$

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Example Question #186 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

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

12, 11, 10, 9, 8, 7, 6, 5

$\frac{\begin{array}[b]{r}12\\ -\ 7\end{array}}{ \ \ \ \space 5}$

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Example Question #187 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

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

11,10,9,8

$\frac{\begin{array}[b]{r}11\\ -\ 3\end{array}}{ \ \ \ \space 8}$

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Example Question #181 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

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

10,9,8

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

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Example Question #481 : Ssat Elementary Level Quantitative (Math)

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

Possible Answers:

Correct answer:

Explanation:

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

4,3,2,1,0

$\frac{\begin{array}[b]{r}4\\ -\ 4\end{array}}{ \ \ \ \space 0}$

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Example Question #182 : Operations & Algebraic Thinking

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

Possible Answers:

Correct answer:

Explanation:

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

14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3

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

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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 #481 : Numbers And Operations

Example Question #182 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #1831 : Common Core Math: Grade 2

Example Question #184 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #181 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #186 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #187 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #181 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #481 : Ssat Elementary Level Quantitative (Math)

Example Question #182 : Operations & Algebraic Thinking

All Common Core: 2nd Grade Math Resources

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