绝对值计算器 — 公式
## Absolute Value
### Definition
**|x| = x if x ≥ 0, and |x| = -x if x < 0**
The absolute value of a number is its distance from zero on the number line, always non-negative.
### Properties
- |x| ≥ 0 for all x
- |x| = 0 only when x = 0
- |xy| = |x| × |y|
- |x + y| ≤ |x| + |y| (triangle inequality)
### Definition
**|x| = x if x ≥ 0, and |x| = -x if x < 0**
The absolute value of a number is its distance from zero on the number line, always non-negative.
### Properties
- |x| ≥ 0 for all x
- |x| = 0 only when x = 0
- |xy| = |x| × |y|
- |x + y| ≤ |x| + |y| (triangle inequality)
计算示例
Find the absolute value of -7.5.
- |-7.5| = 7.5
- The number is negative, so the sign is -1
- (-7.5)² = 56.25