SSAT Elementary Level Quantitative - How to subtract

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

Explanation

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

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

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

Explanation

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

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

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

Explanation

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

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

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

Explanation

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

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

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

Explanation

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

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

$\frac{\begin{array}[b]{r}15\ -\ 11\end{array}}{ \ \ \ \space ?}$

Explanation

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

$\frac{\begin{array}[b]{r}15\ -\ 11\end{array}}{ \ \ \ \ \ \space 4}$

Use the triangles Screen shot 2015 08 20 at 11.07.59 am below to help you answer the subtraction problem.

Screen shot 2015 08 24 at 9.58.04 am

Explanation

We have triangles and we want to subtract triangles, which means the same thing as take them away. We can cross off the triangles that we are subtracting, and count the number that we have left. In this case we have triangles left. Subtraction is like counting backwards. We can start at and count back .