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Common Core: 2nd Grade Math : Mentally Add and Subtract 10 or 100 to a Given Number : CCSS.Math.Content.2.NBT.B.8

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 #1093 : Number & Operations In Base Ten

$\frac{\begin{array}[b]{r}134\\ +\ 10\end{array}}{?}$

Possible Answers:

234

135

200

144

244

Correct answer:

144

Explanation:

When adding any number by 100 the only number that will change in your answer is the tens place.

4+0=4

3+1=4

1+0=1

$\frac{\begin{array}[b]{r}134\\ +\ 10\end{array}}{\ \ \space144}$

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Example Question #1191 : Ssat Elementary Level Quantitative (Math)

$\frac{\begin{array}[b]{r}629\\ +\ 10\end{array}}{?}$

Possible Answers:

619

729

630

639

649

Correct answer:

639

Explanation:

When adding any number by the only number that will change in your answer is the tens place.

9+0=9

2+1=3

6+0=6

$\frac{\begin{array}[b]{r}629\\ +\ 10\end{array}}{\ \ \space639}$

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Example Question #1101 : Common Core Math: Grade 2

$\frac{\begin{array}[b]{r}812\\ +\ 10\end{array}}{?}$

Possible Answers:

832

802

912

822

813

Correct answer:

822

Explanation:

When adding any number by the only number that will change in your answer is the tens place.

2+0=2

1+1=2

8+0=8

$\frac{\begin{array}[b]{r}812\\ +\ 10\end{array}}{\ \ \space822}$

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Example Question #281 : Numbers And Operations

$\frac{\begin{array}[b]{r}432\\ -\ 100\end{array}}{?}$

Possible Answers:

532

332

542

442

542

Correct answer:

332

Explanation:

When subtracting any number by 100 the only number that will change in your answer is the hundreds place.

2-0=2

3-0=3

4-1=3

$\frac{\begin{array}[b]{r}432\\ -\ 100\end{array}}{ \ \ \ \space 332}$

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Example Question #63 : How To Subtract

$\frac{\begin{array}[b]{r}349\\ -\ 100\end{array}}{ \ \ \ \space ?}$

Possible Answers:

249

248

449

649

359

Correct answer:

249

Explanation:

When subtracting any number by 100 the only number that will change in your answer is the hundreds place.

9-0=9

4-0=4

3-1=2

$\frac{\begin{array}[b]{r}349\\ -\ 100\end{array}}{ \ \ \ \space 249}$

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Example Question #1101 : Common Core Math: Grade 2

$\frac{\begin{array}[b]{r}222\\ -\ 100\end{array}}{ \ \ \ \space ?}$

Possible Answers:

232

422

122

223

322

Correct answer:

122

Explanation:

When subtracting any number by 100 the only number that will change in your answer is the hundreds place.

2-0=2

2-1=1

$\frac{\begin{array}[b]{r}222\\ -\ 100\end{array}}{ \ \ \ \space122}$

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Example Question #63 : How To Subtract

$\frac{\begin{array}[b]{r}642\\ -\ 100\end{array}}{ \ \ \ \space ?}$

Possible Answers:

542

532

642

442

632

Correct answer:

542

Explanation:

When subtracting any number by 100 the only number that will change in your answer is the hundreds place.

2-0=2

4-0=4

5-1=5

$\frac{\begin{array}[b]{r}642\\ -\ 100\end{array}}{ \ \ \ \space 542}$

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Example Question #67 : How To Subtract

$\frac{\begin{array}[b]{r}789\\ -\ 100\end{array}}{ \ \ \ \space ?}$

Possible Answers:

689

889

589

779

679

Correct answer:

689

Explanation:

When subtracting any number by 100 the only number that will change in your answer is the hundreds place.

9-0=9

8-0=8

7-1=6

$\frac{\begin{array}[b]{r}789\\ -\ 100\end{array}}{ \ \ \ \space 689}$

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Example Question #68 : How To Subtract

$\frac{\begin{array}[b]{r}867\\ -\ 100\end{array}}{ \ \ \ \space ?}$

Possible Answers:

857

866

767

967

757

Correct answer:

767

Explanation:

When subtracting any number by 100 the only number that will change in your answer is the hundreds place.

7-0=7

6-0=6

8-1=7

$\frac{\begin{array}[b]{r}867\\ -\ 100\end{array}}{ \ \ \ \space 767}$

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Example Question #288 : Numbers And Operations

$\frac{\begin{array}[b]{r}100\\ -\ 100\end{array}}{ \ \ \ \space ?}$

Possible Answers:

100

200

Correct answer:

Explanation:

When subtracting any number by 100 the only number that will change in your answer is the hundreds place.

0-0=0

1-1=0

$\frac{\begin{array}[b]{r}100\\ -\ 100\end{array}}{ \ \ \ \ \ \ \space 0}$

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All Common Core: 2nd Grade Math Resources

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Common Core: 2nd Grade Math : Mentally Add and Subtract 10 or 100 to a Given Number : CCSS.Math.Content.2.NBT.B.8

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

All Common Core: 2nd Grade Math Resources

Example Questions

Example Question #1093 : Number & Operations In Base Ten

Example Question #1191 : Ssat Elementary Level Quantitative (Math)

Example Question #1101 : Common Core Math: Grade 2

Example Question #281 : Numbers And Operations

Example Question #63 : How To Subtract

Example Question #1101 : Common Core Math: Grade 2

Example Question #63 : How To Subtract

Example Question #67 : How To Subtract

Example Question #68 : How To Subtract

Example Question #288 : Numbers And Operations

All Common Core: 2nd Grade Math Resources

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