(3⼀5-1⼀2-7⼀12)x(60x1⼀7-60x3⼀7-60x5⼀7)

2024-12-01 12:30:23
推荐回答(1个)
回答1:

(3/5-1/2-7/12)x60x(1/7-3/7-5/7)
=(3/5-1/2-7/12)x60x(-1)
=-60x(3/5-1/2-7/12)
=-60x3/5+60x1/2+60x7/12
=-36+30+35
=29