//浮点数加法运算function FloatAdd(arg1,arg2){ ???var r1,r2,m; ???try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0} ???try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0} ???m=Math.pow(10,Math.max(r1,r2)); ???return (arg1*m+arg2*m)/m;}//浮点数减法运算function FloatSub(arg1,arg2){ ???var r1,r2,m,n; ???try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0} ???try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0} ???m=Math.pow(10,Math.max(r1,r2)); ???//动态控制精度长度 ???n=(r1=r2)?r1:r2; ???return ((arg1*m-arg2*m)/m).toFixed(n);}//浮点数乘法运算function FloatMul(arg1,arg2){ ???var m=0,s1=arg1.toString(),s2=arg2.toString(); ???try{m+=s1.split(".")[1].length}catch(e){} ???try{m+=s2.split(".")[1].length}catch(e){} ???return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m);} //浮点数除法运算function FloatDiv(arg1,arg2){ ???var t1=0,t2=0,r1,r2; ???try{t1=arg1.toString().split(".")[1].length}catch(e){} ???try{t2=arg2.toString().split(".")[1].length}catch(e){} ???with(Math){ ???????r1=Number(arg1.toString().replace(".","")); ???????r2=Number(arg2.toString().replace(".","")); ???????return (r1/r2)*pow(10,t2-t1); ???}}
链接:https://blog.csdn.net/East_MrChiu/article/details/63685345
JS中Float类型加减乘除
原文地址：https://www.cnblogs.com/mangwusuozhi/p/9633152.html