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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 #301 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}13\\ +\ 3\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

13,14,15,16

$\frac{\begin{array}[b]{r}13\\ +\ 3\end{array}}{ \ \ \space16}$

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Example Question #302 : Operations & Algebraic Thinking

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

Possible Answers:

Correct answer:

Explanation:

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

1,2,3,4,5

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

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Example Question #301 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}5\\ +\ 7\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}5\\ +\ 7\end{array}}{ \ \ \space12}$

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Example Question #304 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}1\\ +\ 8\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

1,2,3,4,5,6,7,8,9

$\frac{\begin{array}[b]{r}1\\ +\ 8\end{array}}{ \ \ \ \space9}$

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Example Question #305 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}3\\ +\ 11\end{array}}{ \ \ \space?}$

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

$\frac{\begin{array}[b]{r}3\\ +\ 11\end{array}}{ \ \ \space14}$

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Example Question #304 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}2\\ +\ 13\end{array}}{ \ \ \space?}$

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

$\frac{\begin{array}[b]{r}2\\ +\ 13\end{array}}{ \ \ \space15}$

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Example Question #305 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}4\\ +\ 16\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}4\\ +\ 16\end{array}}{ \ \ \ \space20}$

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Example Question #302 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}15\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

15,16

$\frac{\begin{array}[b]{r}15\\ +\ 1\end{array}}{ \ \ \space16}$

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Example Question #307 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}9\\ +\ 2\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

9,10,11

$\frac{\begin{array}[b]{r}9\\ +\ 2\end{array}}{ \ \ \space11}$

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Example Question #307 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}2\\ +\ 3\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

2,3,4,5

$\frac{\begin{array}[b]{r}2\\ +\ 3\end{array}}{ \ \ \ \space5}$

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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 #301 : Operations & Algebraic Thinking

Example Question #302 : Operations & Algebraic Thinking

Example Question #301 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #304 : Operations & Algebraic Thinking

Example Question #305 : Operations & Algebraic Thinking

Example Question #304 : Operations & Algebraic Thinking

Example Question #305 : Operations & Algebraic Thinking

Example Question #302 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #307 : Operations & Algebraic Thinking

Example Question #307 : Operations & Algebraic Thinking

All Common Core: 2nd Grade Math Resources

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