三分之一加五分之二加四分之三,怎样算简便?越简便越好!

2025-09-12 06:22:11
推荐回答(1个)
回答1:

1/3 + 2/5 + 3/4
= 20/60 + 24/60 + 45/60
= (20 + 24 + 45) / 60
= 89 / 60