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

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Question

Solve the following:

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

Answer

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

$\frac{\begin{array}[b]{r}432\ +\ 100\end{array}}{\ \ \ \space 532}$

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Question

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

Answer

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

$\frac{\begin{array}[b]{r}349\ +\ 100\end{array}}{\ \ \ \space449}$

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Question

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

Answer

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

$\frac{\begin{array}[b]{r}222\ +\ 100\end{array}}{\ \ \ \space322}$

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Question

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

Answer

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

$\frac{\begin{array}[b]{r}587\ +\ 100\end{array}}{\ \ \ \space687}$

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Question

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

Answer

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

$\frac{\begin{array}[b]{r}642\ +\ 100\end{array}}{\ \ \ \space742}$

Compare your answer with the correct one above

Question

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

Answer

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

$\frac{\begin{array}[b]{r}789\ +\ 100\end{array}}{\ \ \ \space889}$

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Question

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

Answer

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

$\frac{\begin{array}[b]{r}867\ +\ 100\end{array}}{\ \ \ \space967}$

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Question

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

Answer

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

$\frac{\begin{array}[b]{r}100\ +\ 100\end{array}}{\ \ \ \space200}$

Compare your answer with the correct one above

Question

$\frac{\begin{array}[b]{r}175\ +\ 100\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}175\ +\ 100\end{array}}{\ \ \ \space275}$

Compare your answer with the correct one above

Question

$\frac{\begin{array}[b]{r}386\ +\ 100\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}386\ +\ 100\end{array}}{\ \ \ \space486}$

Compare your answer with the correct one above

Question

$\frac{\begin{array}[b]{r}428\ +\ 100\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}428\ +\ 100\end{array}}{\ \ \ \space528}$

Compare your answer with the correct one above

Question

$\frac{\begin{array}[b]{r}562\ +\ 100\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}562\ +\ 100\end{array}}{\ \ \ \space662}$

Compare your answer with the correct one above

Question

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

Answer

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

$\frac{\begin{array}[b]{r}432\ +\ 10\end{array}}{\ \ \space 442}$

Compare your answer with the correct one above

Question

$\frac{\begin{array}[b]{r}572\ +\ 10\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}572\ +\ 10\end{array}}{\ \ \space582}$

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Question

$\frac{\begin{array}[b]{r}633\ +\ 10\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}633\ +\ 10\end{array}}{\ \ \space643}$

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Question

$\frac{\begin{array}[b]{r}728\ +\ 10\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}728\ +\ 10\end{array}}{\ \ \space738}$

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Question

$\frac{\begin{array}[b]{r}888\ +\ 10\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}888\ +\ 10\end{array}}{\ \ \space898}$

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Question

$\frac{\begin{array}[b]{r}932\ +\ 10\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}932\ +\ 10\end{array}}{\ \ \space942}$

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Question

$\frac{\begin{array}[b]{r}321\ +\ 10\end{array}}{?}$

Answer

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

$\frac{\begin{array}[b]{r}321\ +\ 10\end{array}}{\ \ \space331}$

Compare your answer with the correct one above

Question

Answer

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

$\frac{\begin{array}[b]{r}286\ +\ 10\end{array}}{\ \ \space296}$

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