Question

How do you simplify `0+50times1-60-60times0+10` using PEMDAS?

Answer 1

`0+50xx1-60-60xx0+10=color(blue)0`

Explanation:

The anagram PEMDAS is a helpful device for remembering the order of operations.

`0+50xx1-60-60xx0+10`

There are no parentheses or exponents, so we start with multiplication and division, moving from left to right.

`50xx1=50`
`-60xx0=0`

Rewrite the expression.

`50-60+0+10`

Simplify by adding and subtracting from left to right.

`-10+10=0`

Answer 2

`0`

Explanation:

Count the number of terms first. Determine an answer for each term and these will be added or subtracted in the last line.

The zeros make the expression look more complicated.

`" "color(red)(0)color(darkgreen)(+50xx1)color(magenta)(-60)color(blue)(-60xx0)color(tomato)(+10)" "larr` there are 5 terms

=`" "color(red)(0)color(darkgreen)(+50)color(magenta)(-60)color(blue)(-0)color(tomato)(+10)" "larr` re-arrange and drop the zeros.

=`" "color(darkgreen)(50)color(tomato)(+10)color(magenta)(-60)" "larr` moving all the add terms to the beginning
`color(white)(xxxxxxxxxxxxxxx)` makes for fewer errors

=`" "0`