1 vue项目安装Decimal

npm install decimal.js

2 注意

运算结果是Decimal对象，需要使用.toNumber()转为数字

3 加 add

const Decimal = require('decimal.js')
const num1 = Decimal("5");
const num2 = Decimal("3");
const remainder = num1.add(num2);

4 减 sub

const Decimal = require('decimal.js')
const num1 = Decimal("5");
const num2 = Decimal("3");
const remainder = num1.sub(num2);

5 乘 mul

const Decimal = require('decimal.js')
const num1 = Decimal("5");
const num2 = Decimal("3");
const remainder = num1.mul(num2);

6 除 div

const Decimal = require('decimal.js')
const num1 = Decimal("5");
const num2 = Decimal("3");
const remainder = num1.div(num2);

7 求余 modulo

const Decimal = require('decimal.js')
const num1 = Decimal("5");
const num2 = Decimal("3");
const remainder = num1.modulo(num2);