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

$\frac{\begin{array}[b]{r}5\\ +\ 10\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

5,6,7,8,9,10,11,12,13,14,15

$\frac{\begin{array}[b]{r}5\\ +\ 10\end{array}}{ \ \ \ \space15}$

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Example Question #272 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}6\\ +\ 11\end{array}}{ \ \ \space?}$

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

$\frac{\begin{array}[b]{r}6\\ +\ 11\end{array}}{ \ \ \ \space17}$

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Example Question #689 : How To Add

$\frac{\begin{array}[b]{r}1\\ +\ 12\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

1,2,3,4,5,6,7,8,9,10,11,12,13

$\frac{\begin{array}[b]{r}1\\ +\ 12\end{array}}{ \ \ \ \space13}$

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Example Question #690 : How To Add

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

Possible Answers:

Correct answer:

Explanation:

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

5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20

$\frac{\begin{array}[b]{r}5\\ +\ 15\end{array}}{ \ \ \ \space20}$

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Example Question #273 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}1\\ +\ 19\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20

$\frac{\begin{array}[b]{r}1\\ +\ 19\end{array}}{ \ \ \space20}$

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Example Question #274 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}3\\ +\ 16\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}3\\ +\ 16\end{array}}{ \ \ \space19}$

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Example Question #585 : How To Add

$\frac{\begin{array}[b]{r}4\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

4,5

$\frac{\begin{array}[b]{r}4\\ +\ 1\end{array}}{ \ \ \space5}$

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Example Question #275 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

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

15,16,17

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

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Example Question #276 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}8\\ +\ 2\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

8,9,10

$\frac{\begin{array}[b]{r}8\\ +\ 2\end{array}}{ \ \ \space10}$

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Example Question #277 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

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

3,4,5,6

$\frac{\begin{array}[b]{r}3\\ +\ 3\end{array}}{ \ \ \ \space6}$

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

Example Question #272 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #689 : How To Add

Example Question #690 : How To Add

Example Question #273 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #274 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #585 : How To Add

Example Question #275 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #276 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #277 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

All Common Core: 2nd Grade Math Resources

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