[1-(1⼀2+1⼀10)×5⼀9]÷4⼀9简便计算

2024-12-18 17:51:20
推荐回答(1个)
回答1:

[1-(1/2+1/10)×5/9]÷4/9
=1÷4/9-(1/2+1/10)×5/9÷4/9
=9/4-6/10×5/9÷4/9
=9/4-6/10×5/4
=9/4-3/4
=6/4
=3/2