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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 #651 : How To Add

$\frac{\begin{array}[b]{r}5\\ +\ 4\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

5,6,7,8,9

$\frac{\begin{array}[b]{r}5\\ +\ 4\end{array}}{ \ \ \ \space9}$

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Example Question #1723 : Numbers And Operations

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

Possible Answers:

Correct answer:

Explanation:

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

5,6,7,8,9,10

$\frac{\begin{array}[b]{r}5\\ +\ 5\end{array}}{ \ \ \space10}$

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Example Question #1724 : Numbers And Operations

$\frac{\begin{array}[b]{r}2\\ +\ 6\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}2\\ +\ 6\end{array}}{ \ \ \ \space8}$

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Example Question #661 : How To Add

$\frac{\begin{array}[b]{r}3\\ +\ 7\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

3,4,5,6,7,8,9,10

$\frac{\begin{array}[b]{r}3\\ +\ 7\end{array}}{ \ \ \space10}$

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Example Question #662 : How To Add

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

Possible Answers:

Correct answer:

Explanation:

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

11,12,13,14,15,16,17

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

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Example Question #1727 : Numbers And Operations

$\frac{\begin{array}[b]{r}9\\ +\ 7\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

9,10,11,12,13,14,15,16

$\frac{\begin{array}[b]{r}9\\ +\ 7\end{array}}{ \ \ \space16}$

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Example Question #1728 : Numbers And Operations

$\frac{\begin{array}[b]{r}1\\ +\ 9\end{array}}{ \ \ \space?}$

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

$\frac{\begin{array}[b]{r}1\\ +\ 9\end{array}}{ \ \ \space10}$

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Example Question #1729 : Numbers And Operations

$\frac{\begin{array}[b]{r}8\\ +\ 10\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}8\\ +\ 10\end{array}}{ \ \ \space18}$

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Example Question #351 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}6\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

6,7

$\frac{\begin{array}[b]{r}6\\ +\ 1\end{array}}{ \ \ \ \space7}$

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Example Question #352 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}4\\ +\ 2\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

4,5,6

$\frac{\begin{array}[b]{r}4\\ +\ 2\end{array}}{ \ \ \ \space6}$

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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 #651 : How To Add

Example Question #1723 : Numbers And Operations

Example Question #1724 : Numbers And Operations

Example Question #661 : How To Add

Example Question #662 : How To Add

Example Question #1727 : Numbers And Operations

Example Question #1728 : Numbers And Operations

Example Question #1729 : Numbers And Operations

Example Question #351 : Operations & Algebraic Thinking

Example Question #352 : Operations & Algebraic Thinking

All Common Core: 2nd Grade Math Resources

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