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Common Core: 1st Grade Math : Number & Operations in Base Ten

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 #5 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}30\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

When we add to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add to the number in the tens place to find our answer.

3+1=4

$\frac{\begin{array}[b]{r}20\\ +\ 10\end{array}}{ \ \ \ \space40}$

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Example Question #5 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}35\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

3+1=4

$\frac{\begin{array}[b]{r}35\\ +\ 10\end{array}}{ \ \ \ \space45}$

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Example Question #6 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}40\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

4+1=5

$\frac{\begin{array}[b]{r}40\\ +\ 10\end{array}}{ \ \ \ \space50}$

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Example Question #17 : Place Value And Properties Of Operations To Add And Subtract

$\frac{\begin{array}[b]{r}45\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

4+1=5

$\frac{\begin{array}[b]{r}45\\ +\ 10\end{array}}{ \ \ \ \space55}$

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Example Question #4 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}50\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

5+1=6

$\frac{\begin{array}[b]{r}50\\ +\ 10\end{array}}{ \ \ \ \space60}$

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Example Question #6 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}55\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

5+1=6

$\frac{\begin{array}[b]{r}55\\ +\ 10\end{array}}{ \ \ \ \space65}$

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Example Question #11 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}60\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

6+1=

$\frac{\begin{array}[b]{r}60\\ +\ 10\end{array}}{ \ \ \ \space70}$

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Example Question #11 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}65\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

6+1=

$\frac{\begin{array}[b]{r}65\\ +\ 10\end{array}}{ \ \ \ \space75}$

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Example Question #13 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}70\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

7+1=8

$\frac{\begin{array}[b]{r}70\\ +\ 10\end{array}}{ \ \ \ \space80}$

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Example Question #11 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

$\frac{\begin{array}[b]{r}75\\ +\ 10\end{array}}{ \ \ \space}$

Possible Answers:

Correct answer:

Explanation:

7+1=8

$\frac{\begin{array}[b]{r}75\\ +\ 10\end{array}}{ \ \ \ \space85}$

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All Common Core: 1st Grade Math Resources

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Common Core: 1st Grade Math : Number & Operations in Base Ten

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

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #5 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

Example Question #5 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

Example Question #6 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

Example Question #17 : Place Value And Properties Of Operations To Add And Subtract

Example Question #4 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

Example Question #6 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

Example Question #11 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

Example Question #11 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

Example Question #13 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

Example Question #11 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

All Common Core: 1st Grade Math Resources

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