Function decimalSubtract

decimalSubtract(a: number, b: number): number
Precisely subtract two floating-point numbers

精确相减两个数
Parameters
- a: number
  The first number. 第一个数字
- b: number
  The second number. 第二个数字
Returns number
The difference of the two numbers. 两个数字的差
Remarks
The current implementation only considers predictable scenarios and cannot guarantee precise calculation results under all circumstances; For calculation scenarios involving large numbers, finance, science, etc., it is recommended to use open-source libraries such as decimal.js to handle mathematical operations.

当前实现仅考虑可预期的场景，无法保证在所有情况下都能精确计算结果；涉及到大数、金融、科学等计算场景，建议使用 decimal.js 等开源库来处理数学运算
Example
```
decimalSubtract(0.1, 0.2) // => -0.1
decimalSubtract(1.5, 2.3) // => -0.8
decimalSubtract(10.001, 20.002) // => -10.001
```
- Defined in src/math/decimal.ts:59