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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

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All Common Core: 2nd Grade Math Resources

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Example Questions

Example Question #1093 : Number & Operations In Base Ten

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

Possible Answers:

234 $\displaystyle 234$

135 $\displaystyle 135$

200 $\displaystyle 200$

144 $\displaystyle 144$

244 $\displaystyle 244$

Correct answer:

144 $\displaystyle 144$

Explanation:

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

4+0=4 $\displaystyle 4+0=4$

3+1=4 $\displaystyle 3+1=4$

1+0=1 $\displaystyle 1+0=1$

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

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Example Question #21 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

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

Possible Answers:

619 $\displaystyle 619$

639 $\displaystyle 639$

649 $\displaystyle 649$

630 $\displaystyle 630$

729 $\displaystyle 729$

Correct answer:

639 $\displaystyle 639$

Explanation:

When adding any number by $\displaystyle 10$ the only number that will change in your answer is the tens place.

9+0=9 $\displaystyle 9+0=9$

2+1=3 $\displaystyle 2+1=3$

6+0=6 $\displaystyle 6+0=6$

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

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Example Question #22 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

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

Possible Answers:

802 $\displaystyle 802$

813 $\displaystyle 813$

912 $\displaystyle 912$

822 $\displaystyle 822$

832 $\displaystyle 832$

Correct answer:

822 $\displaystyle 822$

Explanation:

When adding any number by $\displaystyle 10$ the only number that will change in your answer is the tens place.

2+0=2 $\displaystyle 2+0=2$

1+1=2 $\displaystyle 1+1=2$

8+0=8 $\displaystyle 8+0=8$

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

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Example Question #281 : Numbers And Operations

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

Possible Answers:

532 $\displaystyle 532$

332 $\displaystyle 332$

542 $\displaystyle 542$

442 $\displaystyle 442$

542 $\displaystyle 542$

Correct answer:

332 $\displaystyle 332$

Explanation:

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

2-0=2 $\displaystyle 2-0=2$

3-0=3 $\displaystyle 3-0=3$

4-1=3 $\displaystyle 4-1=3$

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

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Example Question #23 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

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

Possible Answers:

359 $\displaystyle 359$

248 $\displaystyle 248$

249 $\displaystyle 249$

649 $\displaystyle 649$

449 $\displaystyle 449$

Correct answer:

249 $\displaystyle 249$

Explanation:

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

9-0=9 $\displaystyle 9-0=9$

4-0=4 $\displaystyle 4-0=4$

3-1=2 $\displaystyle 3-1=2$

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

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Example Question #22 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

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

Possible Answers:

223 $\displaystyle 223$

422 $\displaystyle 422$

322 $\displaystyle 322$

232 $\displaystyle 232$

122 $\displaystyle 122$

Correct answer:

122 $\displaystyle 122$

Explanation:

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

2-0=2 $\displaystyle 2-0=2$

2-1=1 $\displaystyle 2-1=1$

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

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Example Question #23 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

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

Possible Answers:

632 $\displaystyle 632$

642 $\displaystyle 642$

442 $\displaystyle 442$

542 $\displaystyle 542$

532 $\displaystyle 532$

Correct answer:

542 $\displaystyle 542$

Explanation:

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

2-0=2 $\displaystyle 2-0=2$

4-0=4 $\displaystyle 4-0=4$

5-1=5 $\displaystyle 5-1=5$

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

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Example Question #24 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

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

Possible Answers:

889 $\displaystyle 889$

689 $\displaystyle 689$

589 $\displaystyle 589$

679 $\displaystyle 679$

779 $\displaystyle 779$

Correct answer:

689 $\displaystyle 689$

Explanation:

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

9-0=9 $\displaystyle 9-0=9$

8-0=8 $\displaystyle 8-0=8$

7-1=6 $\displaystyle 7-1=6$

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

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Example Question #65 : How To Subtract

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

Possible Answers:

767 $\displaystyle 767$

857 $\displaystyle 857$

866 $\displaystyle 866$

967 $\displaystyle 967$

757 $\displaystyle 757$

Correct answer:

767 $\displaystyle 767$

Explanation:

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

7-0=7 $\displaystyle 7-0=7$

6-0=6 $\displaystyle 6-0=6$

8-1=7 $\displaystyle 8-1=7$

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

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Example Question #288 : Numbers And Operations

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

Possible Answers:

100 $\displaystyle 100$

$\displaystyle 10$

$\displaystyle 0$

200 $\displaystyle 200$

$\displaystyle 20$

Correct answer:

$\displaystyle 0$

Explanation:

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

0-0=0 $\displaystyle 0-0=0$

1-1=0 $\displaystyle 1-1=0$

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

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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 #21 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

Example Question #22 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

Example Question #281 : Numbers And Operations

Example Question #23 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

Example Question #22 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

Example Question #23 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

Example Question #24 : Mentally Add And Subtract 10 Or 100 To A Given Number : Ccss.Math.Content.2.Nbt.B.8

Example Question #65 : How To Subtract

Example Question #288 : Numbers And Operations

All Common Core: 2nd Grade Math Resources

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