Question

How do you solve `90-:6+4*8-19`?

Answer 1

`18`

Explanation:

Count the number of terms first.
Each one must simplify to a single answer and the answers can be added or subtracted in the LAST step.

`color(red)(90-:6)color(blue)(+4xx8) color(magenta)(-19)" has 3 terms"`

=`color(red)(15)color(blue)(+32) color(magenta)(-19)`

=`18`

Notice that we can work in different terms at the same time.
The calculations within different terms are independent of each other.