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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

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Example Questions

Example Question #382 : Operations & Algebraic Thinking

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

Possible Answers:

$\displaystyle 15$

$\displaystyle 14$

$\displaystyle 17$

$\displaystyle 18$

$\displaystyle 16$

Correct answer:

$\displaystyle 16$

Explanation:

To add we count up. Start at $\displaystyle 11$ and count up $\displaystyle 5$.

$\displaystyle 11,12,13,14,15,16$

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

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Example Question #281 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}1\\ +\ 7\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 7\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 10$

$\displaystyle 11$

$\displaystyle 12$

$\displaystyle 8$

$\displaystyle 9$

Correct answer:

$\displaystyle 8$

Explanation:

To add we count up. Start at $\displaystyle 1$ and count up $\displaystyle 7$.

$\displaystyle 1,2,3,4,5,6,7,8$

$\frac{\begin{array}[b]{r}1\\ +\ 7\end{array}}{ \ \ \ \space8}$ $\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 7\end{array}}{ \ \ \ \space8}$

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Example Question #261 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}8\\ +\ 6\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 6\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 10$

$\displaystyle 11$

$\displaystyle 12$

$\displaystyle 14$

$\displaystyle 13$

Correct answer:

$\displaystyle 14$

Explanation:

To add we count up. Start at $\displaystyle 8$ and count up $\displaystyle 6$.

$\displaystyle 8,9,10,11,12,13,14$

$\frac{\begin{array}[b]{r}8\\ +\ 6\end{array}}{ \ \ \space14}$ $\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 6\end{array}}{ \ \ \space14}$

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Example Question #261 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}4\\ +\ 8\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}4\\ +\ 8\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 14$

$\displaystyle 11$

$\displaystyle 13$

$\displaystyle 15$

$\displaystyle 12$

Correct answer:

$\displaystyle 12$

Explanation:

To add we count up. Start at $\displaystyle 4$ and count up $\displaystyle 8$.

$\displaystyle 4,5,6,7,8,9,10,11,12$

$\frac{\begin{array}[b]{r}4\\ +\ 8\end{array}}{ \ \ \space12}$ $\displaystyle \frac{\begin{array}[b]{r}4\\ +\ 8\end{array}}{ \ \ \space12}$

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Example Question #2241 : Numbers And Operations

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

Possible Answers:

$\displaystyle 15$

$\displaystyle 16$

$\displaystyle 13$

$\displaystyle 17$

$\displaystyle 14$

Correct answer:

$\displaystyle 16$

Explanation:

To add we count up. Start at $\displaystyle 7$ and count up $\displaystyle 9$.

$\displaystyle 7,8,9,10,11,12,13,14,15,16$

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

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Example Question #262 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}12\\ +\ 8\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}12\\ +\ 8\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 16$

$\displaystyle 19$

$\displaystyle 18$

$\displaystyle 20$

$\displaystyle 17$

Correct answer:

$\displaystyle 20$

Explanation:

To add we count up. Start at $\displaystyle 12$ and count up $\displaystyle 8$.

$\displaystyle 12,13,14,15,16,17,18,19,20$

$\frac{\begin{array}[b]{r}12\\ +\ 8\end{array}}{ \ \ \space20}$ $\displaystyle \frac{\begin{array}[b]{r}12\\ +\ 8\end{array}}{ \ \ \space20}$

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Example Question #261 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

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

Possible Answers:

$\displaystyle 17$

$\displaystyle 16$

$\displaystyle 19$

$\displaystyle 20$

$\displaystyle 18$

Correct answer:

$\displaystyle 20$

Explanation:

To add we count up. Start at $\displaystyle 11$ and count up $\displaystyle 9$.

$\displaystyle 11,12,13,14,15,16,17,18,19,20$

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

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Example Question #263 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}1\\ +\ 10\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 10\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 9$

$\displaystyle 13$

$\displaystyle 10$

$\displaystyle 11$

$\displaystyle 12$

Correct answer:

$\displaystyle 11$

Explanation:

To add we count up. Start at $\displaystyle 1$ and count up $\displaystyle 10$.

$\displaystyle 1,2,3,4,5,6,7,8,9,10,11$

$\frac{\begin{array}[b]{r}1\\ +\ 10\end{array}}{ \ \ \ \space11}$ $\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 10\end{array}}{ \ \ \ \space11}$

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Example Question #385 : Operations & Algebraic Thinking

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

Possible Answers:

$\displaystyle 12$

$\displaystyle 14$

$\displaystyle 15$

$\displaystyle 16$

$\displaystyle 13$

Correct answer:

$\displaystyle 12$

Explanation:

To add we count up. Start at $\displaystyle 2$ and count up $\displaystyle 10$.

$\displaystyle 2,3,4,5,6,7,8,9,10,11,12$

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

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Example Question #391 : Common Core Math: Grade 1

$\frac{\begin{array}[b]{r}5\\ +\ 13\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}5\\ +\ 13\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 14$

$\displaystyle 15$

$\displaystyle 16$

$\displaystyle 17$

$\displaystyle 18$

Correct answer:

$\displaystyle 18$

Explanation:

To add we count up. Start at $\displaystyle 5$ and count up $\displaystyle 13$.

$\displaystyle 5,6,7,8,9,10,11,12,13,14,15,16,17,18$

$\frac{\begin{array}[b]{r}5\\ +\ 13\end{array}}{ \ \ \ \space18}$ $\displaystyle \frac{\begin{array}[b]{r}5\\ +\ 13\end{array}}{ \ \ \ \space18}$

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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 #382 : Operations & Algebraic Thinking

Example Question #281 : Adding And Subtracting Within 20

Example Question #261 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #261 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #2241 : Numbers And Operations

Example Question #262 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #261 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #263 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #385 : Operations & Algebraic Thinking

Example Question #391 : Common Core Math: Grade 1

All Common Core: 1st Grade Math Resources

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