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

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Answer 1 · 2016-08-10T23:11:41

$18$

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.

How do you solve 90-:6+4*8-1990-:6+4*8-19?