问题
解答题
80-9-0.9-0.09-0.009-0.0009.
答案
80-9-0.9-0.09-0.009-0.0009,
=80-(9+0.9+0.09+0.009+0.0009),
=80-9.9999,
=80-(10-0.0001),
=80-10+0.0001,
=70.0001.
80-9-0.9-0.09-0.009-0.0009.
80-9-0.9-0.09-0.009-0.0009,
=80-(9+0.9+0.09+0.009+0.0009),
=80-9.9999,
=80-(10-0.0001),
=80-10+0.0001,
=70.0001.