(7⼀12-5⼀18)÷1⼀12-2⼀3用简便方法计算

2024-11-20 12:19:26
推荐回答(1个)
回答1:

=(7/12-5/18)×12-2/3
=7/12×12-5/18×12-2/3
=7-10/3-2/3
=7-(10/3+2/3)
=7-4
=3