caicaichong2048
花朵
共回答了18个问题采纳率:83.3% 举报
(1)1/3:72 0.5:1.6 2/9:/2/3
=1:216 =5:16 =1:3
(2)38cm:57m 0.25:3/5 0.15:4
=19m:2850m =5:12 =3:80
(3)0.75*3/4+3/4*2+7.25/4/3
=3/4(0.75+2)+7.25*3/4
=3.4(0.75+2+7.25)
=3/4*10
=7.5
7/7/9-7/9/7
=7*9/7- 7*7/9
=7(9/7-7/9)
=32/9
7/12*3/7/0.25
=7/4/7/1/4
=1/4/1/4
=1
1/0.1/0.01/1/1000
=1/1/10/1/100/1/1000
=1
不算了.太繁琐了
1年前
1