小数相加减 精度问题

changeCartNum () {
                this.shopCart.num=0;
                this.shopCart.totalMoney=0;
                for(var i=0; i<this.shopCart.items.length;i++){
                    this.shopCart.num+=this.shopCart.items[i].sku.num;
                    this.shopCart.totalMoney+=this.shopCart.items[i].sku.num*this.shopCart.items[i].sku.price;
                }
                if(this.shopCart.num==0){
                    this.showCart= !this.showCart;
                }
                this.shopCart.totalMoney= this.getCurrentMoney(this.shopCart.totalMoney);
            },
            getCurrentMoney (money) {
                let money1 = money * 100;
                let intMoney1 = parseInt(money1);
                let diff = money1 - intMoney1;
                let decDiff = parseInt(diff * 10);
                if (decDiff > 5) {
                    intMoney1 += 1;
                }

                return intMoney1/100;
            }