2-1⼀5-1又3⼀5,简便运算过程?

2024-12-03 15:31:45
推荐回答(2个)
回答1:

解:原式
=2-1/5-8/5
=10/5-1/5-8/5
=1/5

回答2:

原式=2-1/5-(1+3/5)
=2-1-1/5-3/5
=1-4/5
=1/5