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Common Core: 2nd Grade Math : Operations & Algebraic Thinking

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

$\frac{\begin{array}[b]{r}8\\ +\ 5\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

8,9,10,11,12,13

$\frac{\begin{array}[b]{r}8\\ +\ 5\end{array}}{ \ \ \space13}$

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Example Question #281 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}8\\ +\ 7\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}8\\ +\ 7\end{array}}{ \ \ \space15}$

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Example Question #283 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}3\\ +\ 9\end{array}}{ \ \ \space?}$

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

$\frac{\begin{array}[b]{r}3\\ +\ 9\end{array}}{ \ \ \space12}$

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Example Question #284 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

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

$\frac{\begin{array}[b]{r}5\\ +\ 11\end{array}}{ \ \ \space16}$

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Example Question #285 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}2\\ +\ 16\end{array}}{ \ \ \space18}$

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Example Question #286 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}6\\ +\ 6\end{array}}{ \ \ \space12}$

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Example Question #287 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}5\\ +\ 3\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

5,6,7,8

$\frac{\begin{array}[b]{r}5\\ +\ 3\end{array}}{ \ \ \ \space8}$

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Example Question #288 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}13\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

13,14

$\frac{\begin{array}[b]{r}13\\ +\ 1\end{array}}{ \ \ \space14}$

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Example Question #289 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}2\\ +\ 18\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}2\\ +\ 18\end{array}}{ \ \ \ \space20}$

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Example Question #593 : How To Add

$\frac{\begin{array}[b]{r}12\\ +\ 4\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

12,13,14,15,16

$\frac{\begin{array}[b]{r}12\\ +\ 4\end{array}}{ \ \ \space16}$

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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 : Operations & Algebraic Thinking

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

All Common Core: 2nd Grade Math Resources

Example Questions

Example Question #281 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #281 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #283 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #284 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #285 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #286 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #287 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #288 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #289 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #593 : How To Add

All Common Core: 2nd Grade Math Resources

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