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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

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

Example Questions

Example Question #881 : Ssat Elementary Level Quantitative (Math)

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

Possible Answers:

Correct answer:

Explanation:

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

12,11,10

$\frac{\begin{array}[b]{r}12\\ -\ 2\end{array}}{ \ \ \space 10}$

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Example Question #122 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}19\\ -\ 13\end{array}}{ \ \ \ \ \space ?}$

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, 6

$\frac{\begin{array}[b]{r}19\\ -\ 13\end{array}}{ \ \ \ \ \space 6}$

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Example Question #123 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}18\\ -\ 10\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}18\\ -\ 10\end{array}}{ \ \ \ \ \space 8}$

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Example Question #124 : Adding And Subtracting Within 20

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

Possible Answers:

Correct answer:

Explanation:

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

17,16

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

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Example Question #125 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}16\\ -\ 13\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3

$\frac{\begin{array}[b]{r}16\\ -\ 13\end{array}}{ \ \ \ \ \ \space 3}$

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Example Question #126 : Adding And Subtracting Within 20

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

Possible Answers:

Correct answer:

Explanation:

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

15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0

$\frac{\begin{array}[b]{r}15\\ -\ 15\end{array}}{ \ \ \ \ \space 0}$

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Example Question #127 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}13\\ -\ 11\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}13\\ -\ 11\end{array}}{ \ \ \ \ \space 2}$

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Example Question #131 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}12\\ -\ 4\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

12, 11, 10, 9, 8

$\frac{\begin{array}[b]{r}12\\ -\ 4\end{array}}{ \ \ \ \space 8}$

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Example Question #132 : Adding And Subtracting Within 20

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

Possible Answers:

Correct answer:

Explanation:

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

11,10,9

$\frac{\begin{array}[b]{r}11\\ -\ 2\end{array}}{ \ \ \ \space 9}$

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Example Question #133 : Adding And Subtracting Within 20

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

Possible Answers:

Correct answer:

Explanation:

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

10, 9, 8, 7, 6, 5, 4, 3, 2, 1

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

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All Common Core: 1st Grade Math Resources

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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 #881 : Ssat Elementary Level Quantitative (Math)

Example Question #122 : Adding And Subtracting Within 20

Example Question #123 : Adding And Subtracting Within 20

Example Question #124 : Adding And Subtracting Within 20

Example Question #125 : Adding And Subtracting Within 20

Example Question #126 : Adding And Subtracting Within 20

Example Question #127 : Adding And Subtracting Within 20

Example Question #131 : Adding And Subtracting Within 20

Example Question #132 : Adding And Subtracting Within 20

Example Question #133 : Adding And Subtracting Within 20

All Common Core: 1st Grade Math Resources

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