Step by step
The question
Question: work out |4 − 9|.
|4 − 9|
1 Inside the bars
Order: ( ) → x² √ → × ÷ → + −
We take away more than we have.
Start at 4.
Go down 9.
We pass 0 and land on −5.
= |−5|
2 Absolute value
| | = how far from 0
The bars mean: how far from 0?
That is never negative.
So |−5| is 5.
= 5
So the answer is 5.
Let's look back.
First: inside the bars.
Last: absolute value.
Answer
= 5