# What is 4*9div2+(-4+6)?

Jan 12, 2017

$20$

#### Explanation:

There are two terms. Calculate each one separately.
Within each term the order of operations applies. Multiply and divide are equally strong so can be done in any order.

$\textcolor{b l u e}{\frac{4 \times 9}{2}} \textcolor{red}{+ \left(- 4 + 6\right)}$

$= \textcolor{b l u e}{18} \textcolor{red}{+ 2}$

$= 20$

Note:

$\textcolor{b l u e}{\frac{4 \times 9}{2}}$ can be worked out as:

$\textcolor{b l u e}{\frac{36}{2}} = 18$

or: $\textcolor{b l u e}{\frac{{\cancel{4}}^{2} \times 9}{\cancel{2}}}$

$= 2 \times 9 = 18$