2⼀3+2⼀8+2⼀15+2⼀24+2⼀35+2⼀48+2⼀63+2⼀80=?

简算 要过程急!!
2024-12-16 13:42:44
推荐回答(2个)
回答1:

原式=(2/3+2/15)+(2/8+2/24+2/48)+(2/35+2/63)+2/80
=4/5+3/8+4/45+1/40
=(36/45+4/45)+(15/40+1/40)
=8/9+2/5
=58/45

回答2:

=(2/3+2/15)+(2/8+2/24+2/48)+(2/35+2/63)+2/80 =4/5+3/8+4/45+1/40 =(36/45+4/45)+(15/40+1/40) =8/9+2/5 =58/45