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Common Core: 2nd Grade Math : Common Core Math: Grade 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 #496 : Numbers And Operations

$\frac{\begin{array}[b]{r}15\\ -\ 10\end{array}}{ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}15\\ -\ 10\end{array}}{ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 9$

$\displaystyle 7$

$\displaystyle 5$

$\displaystyle 8$

$\displaystyle 10$

Correct answer:

$\displaystyle 5$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 15$ and count back $\displaystyle 10$.

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

$\frac{\begin{array}[b]{r}15\\ -\ 10\end{array}}{ \ \ \ \ \ \space 5}$ $\displaystyle \frac{\begin{array}[b]{r}15\\ -\ 10\end{array}}{ \ \ \ \ \ \space 5}$

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Example Question #497 : Numbers And Operations

$\frac{\begin{array}[b]{r}14\\ -\ 11\end{array}}{ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}14\\ -\ 11\end{array}}{ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 5$

$\displaystyle 1$

$\displaystyle 2$

$\displaystyle 4$

$\displaystyle 3$

Correct answer:

$\displaystyle 3$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 14$ and count back $\displaystyle 11$.

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

$\frac{\begin{array}[b]{r}14\\ -\ 11\end{array}}{ \ \ \ \ \space 3}$ $\displaystyle \frac{\begin{array}[b]{r}14\\ -\ 11\end{array}}{ \ \ \ \ \space 3}$

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Example Question #498 : Numbers And Operations

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

Possible Answers:

$\displaystyle 0$

$\displaystyle 3$

$\displaystyle 4$

$\displaystyle 2$

$\displaystyle 1$

Correct answer:

$\displaystyle 0$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 12$ and count back $\displaystyle 12$.

$\displaystyle 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0$

$\frac{\begin{array}[b]{r}12\\ -\ 12\end{array}}{ \ \ \ \space 0}$ $\displaystyle \frac{\begin{array}[b]{r}12\\ -\ 12\end{array}}{ \ \ \ \space 0}$

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Example Question #499 : Numbers And Operations

$\frac{\begin{array}[b]{r}11\\ -\ 6\end{array}}{ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}11\\ -\ 6\end{array}}{ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 4$

$\displaystyle 7$

$\displaystyle 5$

$\displaystyle 6$

$\displaystyle 8$

Correct answer:

$\displaystyle 5$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 11$ and count back $\displaystyle 6$.

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

$\frac{\begin{array}[b]{r}11\\ -\ 6\end{array}}{ \ \ \ \space 5}$ $\displaystyle \frac{\begin{array}[b]{r}11\\ -\ 6\end{array}}{ \ \ \ \space 5}$

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Example Question #500 : Numbers And Operations

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

Possible Answers:

$\displaystyle 7$

$\displaystyle 8$

$\displaystyle 9$

$\displaystyle 6$

$\displaystyle 7$

Correct answer:

$\displaystyle 9$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 10$ and count back $\displaystyle 1$.

10,9 $\displaystyle 10,9$

$\frac{\begin{array}[b]{r}10\\ -\ 1\end{array}}{ \ \ \ \space 9}$ $\displaystyle \frac{\begin{array}[b]{r}10\\ -\ 1\end{array}}{ \ \ \ \space 9}$

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Example Question #191 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

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

Possible Answers:

$\displaystyle 4$

$\displaystyle 2$

$\displaystyle 3$

$\displaystyle 5$

$\displaystyle 6$

Correct answer:

$\displaystyle 4$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 5$ and count back $\displaystyle 1$.

5,4 $\displaystyle 5,4$

$\frac{\begin{array}[b]{r}5\\ -\ 1\end{array}}{ \ \ \ \space 4}$ $\displaystyle \frac{\begin{array}[b]{r}5\\ -\ 1\end{array}}{ \ \ \ \space 4}$

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Example Question #201 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

$\frac{\begin{array}[b]{r}17\\ -\ 16\end{array}}{ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}17\\ -\ 16\end{array}}{ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 2$

$\displaystyle 3$

$\displaystyle 0$

$\displaystyle 4$

$\displaystyle 1$

Correct answer:

$\displaystyle 1$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 17$ and count back $\displaystyle 16$.

$\displaystyle 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1$

$\frac{\begin{array}[b]{r}17\\ -\ 16\end{array}}{ \ \ \ \ \ \space 1}$ $\displaystyle \frac{\begin{array}[b]{r}17\\ -\ 16\end{array}}{ \ \ \ \ \ \space 1}$

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Example Question #282 : How To Subtract

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

Possible Answers:

$\displaystyle 1$

$\displaystyle 3$

$\displaystyle 2$

$\displaystyle 0$

$\displaystyle 4$

Correct answer:

$\displaystyle 0$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 14$ and count back $\displaystyle 14$.

$\displaystyle 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0$

$\frac{\begin{array}[b]{r}14\\ -\ 14\end{array}}{ \ \ \ \space 0}$ $\displaystyle \frac{\begin{array}[b]{r}14\\ -\ 14\end{array}}{ \ \ \ \space 0}$

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Example Question #501 : Numbers And Operations

$\frac{\begin{array}[b]{r}19\\ -\ 10\end{array}}{ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 10\end{array}}{ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 8$

$\displaystyle 5$

$\displaystyle 9$

$\displaystyle 6$

$\displaystyle 7$

Correct answer:

$\displaystyle 9$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 19$ and count back $\displaystyle 10$.

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

$\frac{\begin{array}[b]{r}19\\ -\ 10\end{array}}{ \ \ \ \ \space 9}$ $\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 10\end{array}}{ \ \ \ \ \space 9}$

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Example Question #502 : Numbers And Operations

$\frac{\begin{array}[b]{r}19\\ -\ 14\end{array}}{ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 14\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 8$

$\displaystyle 9$

$\displaystyle 5$

$\displaystyle 6$

$\displaystyle 7$

Correct answer:

$\displaystyle 5$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 19$ and count back $\displaystyle 14$.

$\displaystyle 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5$

$\frac{\begin{array}[b]{r}19\\ -\ 14\end{array}}{ \ \ \ \ \space 5}$ $\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 14\end{array}}{ \ \ \ \ \space 5}$

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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 : Common Core Math: Grade 2

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

All Common Core: 2nd Grade Math Resources

Example Questions

Example Question #496 : Numbers And Operations

Example Question #497 : Numbers And Operations

Example Question #498 : Numbers And Operations

Example Question #499 : Numbers And Operations

Example Question #500 : Numbers And Operations

Example Question #191 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #201 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Example Question #282 : How To Subtract

Example Question #501 : Numbers And Operations

Example Question #502 : Numbers And Operations

All Common Core: 2nd Grade Math Resources

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