javascript算保留两位小数的数字的连加怎么结果出现了保留12位小数的结果?var sum = (4359.45+3975.60+3565.20+3196.20+2881.20+2553.60+2323.05+2054.19+1714.92+1431.24+1359.60).toFixed(2)alert(sum)2023-02-19JavaScript250