The absolute value of negative 51 is blank.
We recognize the two bars around the number negative 51 as absolute value. One way to define absolute value is the distance from zero on a number line.
Here’s our number line. If we put zero here and negative 51 here, then we want to know this distance how far is negative 51 from zero on this number line, how many units apart are they?
There are 51 units from zero to negative 51 on a number line. Negative 51 has an absolute value of 51.
The absolute value of negative 51 equals 51.