Find the Missing Number in Addition and Subtraction Equations: CCSS.MATH.CONTENT.1.OA.D.8 - 1st Grade Math

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Question

Fill in the blank.

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Answer

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. , which means .

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Question

Fill in the blank.

__________

Answer

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. , which means .

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}20\ -\ \ 9\end{array}}{ \ \ \ \ \space 11}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}11\ -\ \ 5\end{array}}{ \ \ \ \ \space 6}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}13\ -\ \ 4\end{array}}{ \ \ \ \ \space 9}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}17\ -\ \ 3\end{array}}{ \ \ \ \space 14}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}10\ -\ \ 2\end{array}}{ \ \ \ \ \space 8}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}13\ -\ \ 6\end{array}}{ \ \ \ \ \space 7}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}9\ -\ \ 7\end{array}}{ \ \ \ \ \space 2}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}14\ -\ \ 8\end{array}}{ \ \ \ \ \space 6}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}15\ -\ \ 10\end{array}}{ \ \ \ \ \ \ \space 5}$

Compare your answer with the correct one above

Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}19\ -\ \ 11\end{array}}{ \ \ \ \ \ \ \space 8}$

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Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}18\ -\ \ 12\end{array}}{ \ \ \ \ \ \ \space 6}$

Compare your answer with the correct one above

Question

Fill in the blank.

__________

Answer

This question is asking what can we add to to get to .

We can count up from until we get to , and count the number of numbers we had to add after .

We have to add numbers to get from to .

Or we can subtract to find the missing number.

$\frac{\begin{array}[b]{r}14\ -\ \ 13\end{array}}{ \ \ \ \ \ \ \space 1}$

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Question

Fill in the blank.

__________

Answer

This question is asking what we take away from to get .

We can add to find the missing number.

$\frac{\begin{array}[b]{r}17\ +\ \ 2\end{array}}{ \ \ \ \space 19}$

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Question

Fill in the blank.

__________

Answer

This question is asking what we take away from to get .

We can add to find the missing number.

$\frac{\begin{array}[b]{r}15\ +\ \ 3\end{array}}{ \ \ \ \space 18}$

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Question

Fill in the blank.

__________

Answer

This question is asking what we take away from to get .

We can add to find the missing number.

$\frac{\begin{array}[b]{r}12\ +\ \ 6\end{array}}{ \ \ \ \space 18}$

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Question

Fill in the blank.

__________

Answer

This question is asking what we take away from to get .

We can add to find the missing number.

$\frac{\begin{array}[b]{r}8\ +\ \ 7\end{array}}{ \ \ \ \space 15}$

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Question

Fill in the blank.

__________

Answer

This question is asking what we take away from to get .

We can add to find the missing number.

$\frac{\begin{array}[b]{r}9\ +\ \ 3\end{array}}{ \ \ \ \space 12}$

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Question

Fill in the blank.

__________

Answer

This question is asking what we take away from to get .

We can add to find the missing number.

$\frac{\begin{array}[b]{r}10\ +\ \ 7\end{array}}{ \ \ \ \space 17}$

Compare your answer with the correct one above

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