九分之七减小括号十五分之七减五分之二小括号

2025-04-04 14:38:15
推荐回答(2个)
回答1:

7/9-(7/15-2/5)
=7/9-(7/15-6/15)
=7/9-1/15
=35/45-3/45
=32/45

回答2:

7/9一(7/15一2/5)=7/9一1/15=96/105