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Common Core: 1st Grade Math : Operations & Algebraic Thinking

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 #190 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}9\\ +\ 4\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}9\\ +\ 4\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 10$

$\displaystyle 12$

$\displaystyle 9$

$\displaystyle 11$

$\displaystyle 13$

Correct answer:

$\displaystyle 13$

Explanation:

To add we count up. Start at $\displaystyle 9$ and count up $\displaystyle 4$.

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

$\frac{\begin{array}[b]{r}9\\ +\ 4\end{array}}{ \ \ \space13}$ $\displaystyle \frac{\begin{array}[b]{r}9\\ +\ 4\end{array}}{ \ \ \space13}$

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Example Question #311 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}4\\ +\ 7\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}4\\ +\ 7\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 12$

$\displaystyle 13$

$\displaystyle 14$

$\displaystyle 15$

$\displaystyle 11$

Correct answer:

$\displaystyle 11$

Explanation:

To add we count up. Start at $\displaystyle 4$ and count up $\displaystyle 7$.

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

$\frac{\begin{array}[b]{r}4\\ +\ 7\end{array}}{ \ \ \space11}$ $\displaystyle \frac{\begin{array}[b]{r}4\\ +\ 7\end{array}}{ \ \ \space11}$

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Example Question #312 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}6\\ +\ 12\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}6\\ +\ 12\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 18$

$\displaystyle 16$

$\displaystyle 15$

$\displaystyle 17$

$\displaystyle 19$

Correct answer:

$\displaystyle 18$

Explanation:

To add we count up. Start at $\displaystyle 6$ and count up $\displaystyle 12$.

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

$\frac{\begin{array}[b]{r}6\\ +\ 12\end{array}}{ \ \ \ \space18}$ $\displaystyle \frac{\begin{array}[b]{r}6\\ +\ 12\end{array}}{ \ \ \ \space18}$

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Example Question #313 : Operations & Algebraic Thinking

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

Possible Answers:

$\displaystyle 20$

$\displaystyle 18$

$\displaystyle 17$

$\displaystyle 19$

$\displaystyle 16$

Correct answer:

$\displaystyle 17$

Explanation:

To add we count up. Start at $\displaystyle 12$ and count up $\displaystyle 5$.

$\displaystyle 12,13,14,15,16,17$

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

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Example Question #314 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}6\\ +\ 9\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}6\\ +\ 9\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 16$

$\displaystyle 15$

$\displaystyle 17$

$\displaystyle 13$

$\displaystyle 14$

Correct answer:

$\displaystyle 15$

Explanation:

To add we count up. Start at $\displaystyle 6$ and count up $\displaystyle 9$.

$\displaystyle 6,7,8,9,10,11,12,13,14,15$

$\frac{\begin{array}[b]{r}6\\ +\ 9\end{array}}{ \ \ \space15}$ $\displaystyle \frac{\begin{array}[b]{r}6\\ +\ 9\end{array}}{ \ \ \space15}$

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Example Question #315 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}1\\ +\ 11\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 11\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 10$

$\displaystyle 11$

$\displaystyle 9$

$\displaystyle 13$

$\displaystyle 12$

Correct answer:

$\displaystyle 12$

Explanation:

To add we count up. Start at $\displaystyle 1$ and count up $\displaystyle 11$.

$\displaystyle 1,2,3,4,5,6,7,8,9,10,11,12$

$\frac{\begin{array}[b]{r}1\\ +\ 11\end{array}}{ \ \ \space12}$ $\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 11\end{array}}{ \ \ \space12}$

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Example Question #316 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}2\\ +\ 14\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}2\\ +\ 14\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 15$

$\displaystyle 17$

$\displaystyle 18$

$\displaystyle 16$

$\displaystyle 19$

Correct answer:

$\displaystyle 16$

Explanation:

To add we count up. Start at $\displaystyle 2$ and count up $\displaystyle 14$.

$\displaystyle 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16$

$\frac{\begin{array}[b]{r}2\\ +\ 14\end{array}}{ \ \ \space16}$ $\displaystyle \frac{\begin{array}[b]{r}2\\ +\ 14\end{array}}{ \ \ \space16}$

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Example Question #317 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}9\\ +\ 10\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}9\\ +\ 10\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 18$

$\displaystyle 20$

$\displaystyle 17$

$\displaystyle 19$

$\displaystyle 16$

Correct answer:

$\displaystyle 19$

Explanation:

To add we count up. Start at $\displaystyle 9$ and count up $\displaystyle 10$.

$\displaystyle 9,10,11,12,13,14,15,16,17,18,19$

$\frac{\begin{array}[b]{r}9\\ +\ 10\end{array}}{ \ \ \ \space19}$ $\displaystyle \frac{\begin{array}[b]{r}9\\ +\ 10\end{array}}{ \ \ \ \space19}$

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Example Question #318 : Operations & Algebraic Thinking

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

Possible Answers:

$\displaystyle 11$

$\displaystyle 12$

$\displaystyle 14$

$\displaystyle 13$

$\displaystyle 15$

Correct answer:

$\displaystyle 11$

Explanation:

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

10,11 $\displaystyle 10,11$

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

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Example Question #319 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}17\\ +\ 2\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}17\\ +\ 2\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 19$

$\displaystyle 16$

$\displaystyle 18$

$\displaystyle 15$

$\displaystyle 17$

Correct answer:

$\displaystyle 19$

Explanation:

To add we count up. Start at $\displaystyle 17$ and count up $\displaystyle 2$.

$\displaystyle 17,18,19$

$\frac{\begin{array}[b]{r}17\\ +\ 2\end{array}}{ \ \ \space19}$ $\displaystyle \frac{\begin{array}[b]{r}17\\ +\ 2\end{array}}{ \ \ \space19}$

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Common Core: 1st Grade Math : Operations & Algebraic Thinking

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

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #190 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #311 : Operations & Algebraic Thinking

Example Question #312 : Operations & Algebraic Thinking

Example Question #313 : Operations & Algebraic Thinking

Example Question #314 : Operations & Algebraic Thinking

Example Question #315 : Operations & Algebraic Thinking

Example Question #316 : Operations & Algebraic Thinking

Example Question #317 : Operations & Algebraic Thinking

Example Question #318 : Operations & Algebraic Thinking

Example Question #319 : Operations & Algebraic Thinking

All Common Core: 1st Grade Math Resources

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