(3/8+1/27)*7+17/29+1/27如何巧算_数学解答

(3/8+1/27)*7+17/29+1/27如何巧算

人气：352 ℃　时间：2020-10-01 19:53:36

解答

=3/8*7+1/27*7+17/29+1/27
=21/8+17/29+(7/27+1/27)
=21/8+17/29+8/27
=21971/6264
=3又3179/6264