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Common Core: 1st Grade Math : Adding and Subtracting Within 20: CCSS.MATH.CONTENT.1.OA.C.6

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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All Common Core: 1st Grade Math Resources

7 Diagnostic Tests 180 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #742 : How To Subtract

$\frac{\begin{array}[b]{r}19\\ -\ 12\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

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

$\frac{\begin{array}[b]{r}19\\ -\ 12\end{array}}{ \ \ \ \ \ \space 7}$

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Example Question #743 : How To Subtract

$\frac{\begin{array}[b]{r}20\\ -\ 16\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

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

$\frac{\begin{array}[b]{r}20\\ -\ 16\end{array}}{ \ \ \ \ \ \space 4}$

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Example Question #171 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

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

Possible Answers:

Correct answer:

Explanation:

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

1,2

$\frac{\begin{array}[b]{r}1\\ +\ 1\end{array}}{ \ \ \ \space2}$

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Example Question #172 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}10\\ +\ 2\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

10,11,12

$\frac{\begin{array}[b]{r}10\\ +\ 2\end{array}}{ \ \ \space12}$

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Example Question #173 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}14\\ +\ 1\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

14,15

$\frac{\begin{array}[b]{r}14\\ +\ 1\end{array}}{ \ \ \space15}$

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Example Question #174 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

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

Possible Answers:

Correct answer:

Explanation:

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

16,17,18,19

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

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Example Question #175 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

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

Possible Answers:

Correct answer:

Explanation:

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

1,2,3,4,5,6

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

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Example Question #176 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}3\\ +\ 6\end{array}}{ \ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}3\\ +\ 6\end{array}}{ \ \ \ \space9}$

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Example Question #177 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}7\\ +\ 10\end{array}}{ \ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

7,8,9,10,11,12,13,14,15,16,17

$\frac{\begin{array}[b]{r}7\\ +\ 10\end{array}}{ \ \ \ \space17}$

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Example Question #178 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}9\\ +\ 11\end{array}}{ \ \ \space?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}9\\ +\ 11\end{array}}{ \ \ \ \space20}$

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All Common Core: 1st Grade Math Resources

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Common Core: 1st Grade Math : Adding and Subtracting Within 20: CCSS.MATH.CONTENT.1.OA.C.6

Study concepts, example questions & explanations for Common Core: 1st Grade Math

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #742 : How To Subtract

Example Question #743 : How To Subtract

Example Question #171 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #172 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #173 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #174 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #175 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #176 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #177 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #178 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

All Common Core: 1st Grade Math Resources

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