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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 #241 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}2\\ +\ 15\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

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

$\frac{\begin{array}[b]{r}2\\ +\ 15\end{array}}{ \ \ \space17}$

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Example Question #242 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}3\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

3,4

$\frac{\begin{array}[b]{r}3\\ +\ 1\end{array}}{ \ \ \ \space4}$

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Example Question #243 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}17\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

17,18

$\frac{\begin{array}[b]{r}17\\ +\ 1\end{array}}{ \ \ \space18}$

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Example Question #244 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up

15,16,17,18

$\frac{\begin{array}[b]{r}15\\ +\ 3\end{array}}{ \ \ \space18}$

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Example Question #245 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

9,10,11,12,13

$\frac{\begin{array}[b]{r}9\\ +\ 4\end{array}}{ \ \ \space13}$

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Example Question #246 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

4,5,6,7,8,9,10,11

$\frac{\begin{array}[b]{r}4\\ +\ 7\end{array}}{ \ \ \space11}$

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Example Question #247 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}6\\ +\ 12\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

6,7,8,9,10,11,12,13,14,15,16,17,18

$\frac{\begin{array}[b]{r}6\\ +\ 12\end{array}}{ \ \ \ \space18}$

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Example Question #248 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}12\\ +\ 5\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

12,13,14,15,16,17

$\frac{\begin{array}[b]{r}12\\ +\ 5\end{array}}{ \ \ \space17}$

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Example Question #581 : How To Add

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

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

6,7,8,9,10,11,12,13,14,15

$\frac{\begin{array}[b]{r}6\\ +\ 9\end{array}}{ \ \ \space15}$

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Example Question #582 : How To Add

$\frac{\begin{array}[b]{r}1\\ +\ 11\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

To add we count up. Start at and count up .

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

$\frac{\begin{array}[b]{r}1\\ +\ 11\end{array}}{ \ \ \space12}$

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All Common Core: 2nd Grade Math Resources

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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 #241 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #242 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #243 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #244 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #245 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #246 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #247 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #248 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #581 : How To Add

Example Question #582 : How To Add

All Common Core: 2nd Grade Math Resources

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