1-1/10-1/100-1/1000-1/10000简算

问题描述:

1-1/10-1/100-1/1000-1/10000
简算

答案是0.8889
1-1/10-1/100-1/1000-1/10000
=10000/10000-1000/10000-100/10000-10/10000-1/10000
=(10000-1000-100-10-1)/10000
=8889/10000
=0.8889

把分母都化成一万得(10000-1000-100-10-1)/10000=8889/10000 满意吗

我们老师说,用小数算
1-1/10-1/100-1/1000-1/10000
=1-0.1-0.01-0.001-0.0001
=0.8889

1-1/10-1/100-1/1000-1/10000
=(10000-1000-100-10-1)/10000
=8889/10000
已经是最简算了,其它都是多余。