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Common Core: 1st Grade Math : Adding and Subtracting Within 20

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

$\frac{\begin{array}[b]{r}12\\ +\ 2\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}12\\ +\ 2\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 17$

$\displaystyle 16$

$\displaystyle 18$

$\displaystyle 15$

$\displaystyle 14$

Correct answer:

$\displaystyle 14$

Explanation:

To add we count up. Start at $\displaystyle 12$ and count up $\displaystyle 2$.

$\displaystyle 12,13,14$

$\frac{\begin{array}[b]{r}12\\ +\ 2\end{array}}{ \ \ \space14}$ $\displaystyle \frac{\begin{array}[b]{r}12\\ +\ 2\end{array}}{ \ \ \space14}$

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Example Question #337 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}1\\ +\ 3\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 3\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 6$

$\displaystyle 3$

$\displaystyle 5$

$\displaystyle 2$

$\displaystyle 4$

Correct answer:

$\displaystyle 4$

Explanation:

To add we count up. Start at $\displaystyle 1$ and count up $\displaystyle 3$.

1,2,3,4 $\displaystyle 1,2,3,4$

$\frac{\begin{array}[b]{r}1\\ +\ 3\end{array}}{ \ \ \ \space4}$ $\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 3\end{array}}{ \ \ \ \space4}$

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Example Question #338 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}13\\ +\ 4\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}13\\ +\ 4\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 15$

$\displaystyle 14$

$\displaystyle 17$

$\displaystyle 16$

$\displaystyle 18$

Correct answer:

$\displaystyle 17$

Explanation:

To add we count up. Start at $\displaystyle 13$ and count up $\displaystyle 4$.

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

$\frac{\begin{array}[b]{r}13\\ +\ 4\end{array}}{ \ \ \space17}$ $\displaystyle \frac{\begin{array}[b]{r}13\\ +\ 4\end{array}}{ \ \ \space17}$

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Example Question #339 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}10\\ +\ 5\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 5\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 16$

$\displaystyle 18$

$\displaystyle 14$

$\displaystyle 17$

$\displaystyle 15$

Correct answer:

$\displaystyle 15$

Explanation:

To add we count up. Start at $\displaystyle 10$ and count up $\displaystyle 5$.

$\displaystyle 10,11,12,13,14,15$

$\frac{\begin{array}[b]{r}10\\ +\ 5\end{array}}{ \ \ \space15}$ $\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 5\end{array}}{ \ \ \space15}$

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Example Question #1251 : How To Add

$\frac{\begin{array}[b]{r}11\\ +\ 4\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}11\\ +\ 4\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 18$

$\displaystyle 17$

$\displaystyle 14$

$\displaystyle 16$

$\displaystyle 15$

Correct answer:

$\displaystyle 15$

Explanation:

To add we count up. Start at $\displaystyle 11$ and count up $\displaystyle 4$.

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

$\frac{\begin{array}[b]{r}11\\ +\ 4\end{array}}{ \ \ \space15}$ $\displaystyle \frac{\begin{array}[b]{r}11\\ +\ 4\end{array}}{ \ \ \space15}$

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Example Question #341 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

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

Possible Answers:

$\displaystyle 10$

$\displaystyle 12$

$\displaystyle 9$

$\displaystyle 11$

$\displaystyle 13$

Correct answer:

$\displaystyle 9$

Explanation:

To add we count up. Start at $\displaystyle 4$ and count up $\displaystyle 5$.

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

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

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Example Question #463 : Common Core Math: Grade 1

$\frac{\begin{array}[b]{r}10\\ +\ 6\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 6\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 15$

$\displaystyle 16$

$\displaystyle 18$

$\displaystyle 19$

$\displaystyle 17$

Correct answer:

$\displaystyle 16$

Explanation:

To add we count up. Start at $\displaystyle 10$ and count up $\displaystyle 6$.

$\displaystyle 10,11,12,13,14,15,16$

$\frac{\begin{array}[b]{r}10\\ +\ 6\end{array}}{ \ \ \space16}$ $\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 6\end{array}}{ \ \ \space16}$

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Example Question #464 : Common Core Math: Grade 1

$\frac{\begin{array}[b]{r}2\\ +\ 8\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}2\\ +\ 8\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 11$

$\displaystyle 10$

$\displaystyle 7$

$\displaystyle 8$

$\displaystyle 9$

Correct answer:

$\displaystyle 10$

Explanation:

To add we count up. Start at $\displaystyle 2$ and count up $\displaystyle 8$.

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

$\frac{\begin{array}[b]{r}2\\ +\ 8\end{array}}{ \ \ \space10}$ $\displaystyle \frac{\begin{array}[b]{r}2\\ +\ 8\end{array}}{ \ \ \space10}$

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Example Question #342 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}2\\ +\ 11\end{array}}{ \ \ \space?}$ $\displaystyle \frac{\begin{array}[b]{r}2\\ +\ 11\end{array}}{ \ \ \space?}$

Possible Answers:

$\displaystyle 12$

$\displaystyle 14$

$\displaystyle 15$

$\displaystyle 11$

$\displaystyle 13$

Correct answer:

$\displaystyle 13$

Explanation:

To add we count up. Start at $\displaystyle 2$ and count up $\displaystyle 11$.

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

$\frac{\begin{array}[b]{r}2\\ +\ 11\end{array}}{ \ \ \space13}$ $\displaystyle \frac{\begin{array}[b]{r}2\\ +\ 11\end{array}}{ \ \ \space13}$

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Example Question #343 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

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

Possible Answers:

$\displaystyle 18$

$\displaystyle 17$

$\displaystyle 20$

$\displaystyle 19$

$\displaystyle 16$

Correct answer:

$\displaystyle 20$

Explanation:

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

$\displaystyle 8,9,10,11,12,13,14,15,16,17,18,19,20$

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

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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

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

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #336 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #337 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #338 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #339 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #1251 : How To Add

Example Question #341 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #463 : Common Core Math: Grade 1

Example Question #464 : Common Core Math: Grade 1

Example Question #342 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #343 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

All Common Core: 1st Grade Math Resources

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