Adding and Subtracting Within 20: CCSS.MATH.CONTENT.1.OA.C.6

Help Questions

1st Grade Math › Adding and Subtracting Within 20: CCSS.MATH.CONTENT.1.OA.C.6

Questions 1 - 10

1

$\frac{\begin{array}[b]{r}20\ -\ 16\end{array}}{ \ \ \ \space ?}$

Explanation

To subtract we can count backwards. Start at and count back .

$\frac{\begin{array}[b]{r}20\ -\ 16\end{array}}{ \ \ \ \ \ \space 4}$

2

$\frac{\begin{array}[b]{r}14\ -\ 11\end{array}}{ \ \ \ \space ?}$

Explanation

To subtract we can count backwards. Start at and count back .

$\frac{\begin{array}[b]{r}14\ -\ 11\end{array}}{ \ \ \ \ \space 3}$

3

$\frac{\begin{array}[b]{r}20\ -\ 13\end{array}}{ \ \ \ \space ?}$

Explanation

To subtract we can count backwards. Start at and count back .

$\frac{\begin{array}[b]{r}20\ -\ 13\end{array}}{ \ \ \ \ \ \space 7}$

4

$\frac{\begin{array}[b]{r}19\ -\ 13\end{array}}{ \ \ \ \ \space ?}$

Explanation

To subtract we can count backwards. Start at and count back .

$\frac{\begin{array}[b]{r}19\ -\ 13\end{array}}{ \ \ \ \ \space 6}$

5

$\frac{\begin{array}[b]{r}20\ -\ 8\end{array}}{ \ \ \ \space ?}$

Explanation

To subtract we can count backwards. Start at and count back .

$\frac{\begin{array}[b]{r}20\ -\ 8\end{array}}{ \ \ \space 12}$

6

$\frac{\begin{array}[b]{r}12\ +\ 2\end{array}}{ \ \ \space?}$

Explanation

To add we count up. Start at and count up .

$\frac{\begin{array}[b]{r}12\ +\ 2\end{array}}{ \ \ \space14}$

7

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

Explanation

To subtract we can count backwards. Start at and count back .

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

8

$\frac{\begin{array}[b]{r}8\ +\ 4\end{array}}{ \ \ \space?}$

Explanation

To add we count up. Start at and count up .

$\frac{\begin{array}[b]{r}8\ +\ 4\end{array}}{ \ \ \space12}$

9

$\frac{\begin{array}[b]{r}1\ +\ 2\end{array}}{ \ \ \space?}$

Explanation

To add we count up. Start at and count up .

$\frac{\begin{array}[b]{r}1\ +\ 2\end{array}}{ \ \ \ \space3}$

10

$\frac{\begin{array}[b]{r}2\ +\ 10\end{array}}{ \ \ \space?}$

Explanation

To add we count up. Start at and count up .

$\frac{\begin{array}[b]{r}2\ +\ 10\end{array}}{ \ \ \space12}$

Page 1 of 39

Return to subject