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Common Core: 2nd Grade Math : Number & Operations in Base Ten

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 #1121 : Number & Operations In Base Ten

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

Possible Answers:

224

124

133

234

144

Correct answer:

124

Explanation:

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

4-0=4

3-1=2

1-0=1

$\frac{\begin{array}[b]{r}134\\ -\ 10\end{array}}{ \ \ \space 124}$

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Example Question #301 : Numbers And Operations

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

Possible Answers:

628

639

519

619

529

Correct answer:

619

Explanation:

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

9-0=9

2-1=1

6-0=6

$\frac{\begin{array}[b]{r}629\\ -\ 10\end{array}}{ \ \ \space 619}$

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Example Question #1122 : Number & Operations In Base Ten

$\frac{\begin{array}[b]{r}741\\ -\ 10\end{array}}{ \ \ \space ?}$

Possible Answers:

841

730

740

731

751

Correct answer:

731

Explanation:

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

1-0=1

4-1=3

7-0=7

$\frac{\begin{array}[b]{r}741\\ -\ 10\end{array}}{ \ \ \space 731}$

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Example Question #1122 : Number & Operations In Base Ten

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

Possible Answers:

802

902

912

832

822

Correct answer:

802

Explanation:

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

2-0=2

1-1=0

8-0=8

$\frac{\begin{array}[b]{r}812\\ -\ 10\end{array}}{ \ \ \space 802}$

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Example Question #1123 : Number & Operations In Base Ten

$\frac{\begin{array}[b]{r}432\\ -\ 10\end{array}}{ \ \ \ \space ?}$

Possible Answers:

332

422

431

312

412

Correct answer:

422

Explanation:

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

2-0=2

3-1=2

4-0=4

$\frac{\begin{array}[b]{r}432\\ -\ 10\end{array}}{ \ \ \ \space 422}$

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Example Question #1121 : Number & Operations In Base Ten

$\frac{\begin{array}[b]{r}741\\ +\ 10\end{array}}{?}$

Possible Answers:

761

841

751

742

641

Correct answer:

751

Explanation:

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

1+0=1

4+1=5

7+0=7

$\frac{\begin{array}[b]{r}741\\ +\ 10\end{array}}{\ \ \space751}$

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Example Question #1122 : Number & Operations In Base Ten

$\frac{\begin{array}[b]{r}587\\ -\ 100\end{array}}{ \ \ \ \space ?}$

Possible Answers:

586

577

487

577

687

Correct answer:

487

Explanation:

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

7-0=7

8-0=8

5-1=4

$\frac{\begin{array}[b]{r}587\\ -\ 100\end{array}}{ \ \ \ \space 487}$

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Example Question #1 : Add Within 1000

Solve:

$\frac{\begin{array}[b]{r}235\\ +\ 204\end{array}}{\space }$

Possible Answers:

439

438

437

436

Correct answer:

439

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left to the tens place, followed by the hundreds place.

Add the numbers in the ones place:

5+4=9

Add the numbers in the tens place:

3+0=3

Add the numbers in the hundreds place:

2+2=4

Your final answer should be 439:

$\frac{\begin{array}[b]{r}235\\ +\ 204\end{array}}{\ \ \ \ 439 }$

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Example Question #2 : Add Within 1000

Solve:

$\frac{\begin{array}[b]{r}330\\ +\ 126\end{array}}{\space }$

Possible Answers:

458

459

456

457

Correct answer:

456

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left to the tens place, followed by the hundreds place.

Add the numbers in the ones place:

0+6=6

Add the numbers in the tens place:

3+2=5

Add the numbers in the hundreds place:

3+1=4

Your final answer should be 456:

$\frac{\begin{array}[b]{r}330\\ +\ 126\end{array}}{\ \ \ 456 }$

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Example Question #3 : Add Within 1000

Solve:

$\frac{\begin{array}[b]{r}387\\ +\ 410\end{array}}{\space }$

Possible Answers:

798

797

795

796

Correct answer:

797

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left to the tens place, followed by the hundreds place.

Add the numbers in the ones place:

7+0=7

Add the numbers in the tens place:

8+1=9

Add the numbers in the hundreds place:

3+4=7

Your final answer should be 797:

$\frac{\begin{array}[b]{r}387\\ +\ 410\end{array}}{\ \ \ 797}$

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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 : Number & Operations in Base Ten

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

All Common Core: 2nd Grade Math Resources

Example Questions

Example Question #1121 : Number & Operations In Base Ten

Example Question #301 : Numbers And Operations

Example Question #1122 : Number & Operations In Base Ten

Example Question #1122 : Number & Operations In Base Ten

Example Question #1123 : Number & Operations In Base Ten

Example Question #1121 : Number & Operations In Base Ten

Example Question #1122 : Number & Operations In Base Ten

Example Question #1 : Add Within 1000

Example Question #2 : Add Within 1000

Example Question #3 : Add Within 1000

All Common Core: 2nd Grade Math Resources

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