简便计算:7⼀15÷13⼀4+5⼀13×4⼀15+1⼀15

2025-02-24 00:09:16
推荐回答(1个)
回答1:

原式=7/15X4/13+5/13X4/15+1/15
=1/15(7X4/13+4X5/13+1)
=1/15(28/13+1)
=1/15X41/13
=41/195