十四分之五减二十七分之二的和乘14加二十七分之一如何运用简便计算

2024-12-03 05:33:54
推荐回答(2个)
回答1:

解:依题意得
(14+1/27)×(5/14-2/27)
=(14+1/27)×(135/378-28/378)
=(14+1/27)×107/378
=107/27+1/27×107/378
=107/27+107/27×1/378
=107/27×(1+1/378)
=107/27×379/378
=40553/10206
=3又9935/10206。

回答2:

(5/14-2/27)×14+1/27
=5/14×14-2/27×14+1/27
=5-28/27+1/27
=5-1=4