Question

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

Answer 1

`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.

`color(blue)((4xx9)/2) color(red)(+ (-4+6))`

`= color(blue)(18) color(red)(+2)`

`=20`

Note:

`color(blue)((4xx9)/2)` can be worked out as:

`color(blue)((36)/2) = 18`

or: `color(blue)((cancel4^2xx9)/cancel2)`

`= 2xx9 = 18`