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

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

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, 2, 1, 0

$\frac{\begin{array}[b]{r}16\\ -\ 16\end{array}}{ \ \ \ \ \ \space 0}$

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Example Question #201 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}15\\ -\ 9\end{array}}{ \ \ \ \ \ \space ?}$

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

$\frac{\begin{array}[b]{r}15\\ -\ 9\end{array}}{ \ \ \ \ \space 6}$

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Example Question #201 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}14\\ -\ 13\end{array}}{ \ \ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

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

$\frac{\begin{array}[b]{r}14\\ -\ 13\end{array}}{ \ \ \ \ \ \space 1}$

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Example Question #83 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}13\\ -\ 8\end{array}}{ \ \ \ \ \ \space ?}$

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

$\frac{\begin{array}[b]{r}13\\ -\ 8\end{array}}{ \ \ \ \ \space 5}$

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Example Question #651 : How To Subtract

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

Possible Answers:

Correct answer:

Explanation:

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

5, 4, 3, 2, 1, 0

$\frac{\begin{array}[b]{r}5\\ -\ 5\end{array}}{ \ \ \ \ \space 0}$

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Example Question #652 : How To Subtract

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

Possible Answers:

Correct answer:

Explanation:

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

7,6,5,4,3

$\frac{\begin{array}[b]{r}7\\ -\ 4\end{array}}{ \ \ \ \ \space 3}$

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Example Question #86 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

$\frac{\begin{array}[b]{r}13\\ -\ 10\end{array}}{ \ \ \ \ \space ?}$

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

$\frac{\begin{array}[b]{r}13\\ -\ 10\end{array}}{ \ \ \ \ \ \space 3}$

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Example Question #201 : Common Core Math: Grade 1

$\frac{\begin{array}[b]{r}3\\ -\ 2\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

3,2,1

$\frac{\begin{array}[b]{r}3\\ -\ 2\end{array}}{ \ \ \ \ \space 1}$

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Example Question #202 : Common Core Math: Grade 1

$\frac{\begin{array}[b]{r}18\\ -\ 4\end{array}}{ \ \ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

18,17,16,15,14

$\frac{\begin{array}[b]{r}18\\ -\ 4\end{array}}{ \ \ \ \space 14}$

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Example Question #203 : Common Core Math: Grade 1

$\frac{\begin{array}[b]{r}20\\ -\ 20\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

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

20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0

$\frac{\begin{array}[b]{r}20\\ -\ 20\end{array}}{ \ \ \ \ \space 0}$

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

Example Question #201 : Operations & Algebraic Thinking

Example Question #201 : Operations & Algebraic Thinking

Example Question #83 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #651 : How To Subtract

Example Question #652 : How To Subtract

Example Question #86 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

Example Question #201 : Common Core Math: Grade 1

Example Question #202 : Common Core Math: Grade 1

Example Question #203 : Common Core Math: Grade 1

All Common Core: 1st Grade Math Resources

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