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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 #713 : How To Add

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

Possible Answers:

Correct answer:

Explanation:

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

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

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

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Example Question #711 : How To Add

$\frac{\begin{array}[b]{r}6\\ +\ 10\end{array}}{ \ \ \space?}$

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

$\frac{\begin{array}[b]{r}6\\ +\ 10\end{array}}{ \ \ \ \space16}$

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Example Question #715 : How To Add

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

Possible Answers:

Correct answer:

Explanation:

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

10,11,12,13,14,15,16,17,18,19,20

$\frac{\begin{array}[b]{r}10\\ +\ 10\end{array}}{ \ \ \ \space20}$

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Example Question #712 : How To Add

$\frac{\begin{array}[b]{r}4\\ +\ 11\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

4,5,6,7,8,9,10,11,12,13,14,15

$\frac{\begin{array}[b]{r}4\\ +\ 11\end{array}}{ \ \ \ \space15}$

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Example Question #717 : How To Add

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

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

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

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Example Question #718 : How To Add

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

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}6\\ +\ 14\end{array}}{ \ \ \ \space20}$

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Example Question #713 : How To Add

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

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

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

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Example Question #712 : How To Add

$\frac{\begin{array}[b]{r}3\\ +\ 17\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}3\\ +\ 17\end{array}}{ \ \ \ \space20}$

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Example Question #721 : How To Add

$\frac{\begin{array}[b]{r}5\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

5,6

$\frac{\begin{array}[b]{r}5\\ +\ 1\end{array}}{ \ \ \ \space6}$

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Example Question #383 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}18\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

18,19

$\frac{\begin{array}[b]{r}18\\ +\ 1\end{array}}{ \ \ \space19}$

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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 #713 : How To Add

Example Question #711 : How To Add

Example Question #715 : How To Add

Example Question #712 : How To Add

Example Question #717 : How To Add

Example Question #718 : How To Add

Example Question #713 : How To Add

Example Question #712 : How To Add

Example Question #721 : How To Add

Example Question #383 : Operations & Algebraic Thinking

All Common Core: 2nd Grade Math Resources

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