0.123456,0.12346,( ),0.124,0.12,0.1括号里填什么,
问题描述:
0.123456,0.12346,( ),0.124,0.12,0.1括号里填什么,
答
0.123456,0.12346,( 0.1235),0.124,0.12,0.1
每次去掉小数点最后一个数,四舍五入.能说明白点吗0.123456,最后一位小数是6,舍去,变0.12345,但是6是大于5的数,根据四舍五入法,变0.12346。0.12346,最后一位小数是6,舍去,变0.1234,但是6是大于5的数,根据四舍五入法,变0.1235。0.1235,最后一位小数是5,舍去,变0.1234,但是5是等于5的数,根据四舍五入法,变0.124。0.124,最后一位小数是4,舍去,变0.12,但是4是小于5的数,根据四舍五入法,就是0.124。这样来的,四舍五入法。