Question

Which number has the greatest absolute value: -20 , -10 , 0 , -10 ? help me out please.

Answer 1

The absolute value of any number is how far away it is from 0.

for example: 5 is 5 away from 0.
and -5 is also 5 away from 0.

100 is 100 away from 0 and -25 is 25 away from 0.

Answer 2

\[|x|=x\ \ \ \ \text{iff}\ x\ge0\\\ \ \ \ \ \ \ -x\ \text{iff}\ x\lt0\]