求比值.40:0.5.1.5:1.2.7.2:18.12分之5:5.2:
问题描述:
求比值.40:0.5.1.5:1.2.7.2:18.12分之5:5.2:
答
40:0.5
=80:1
=80
1.5:1.2
=15:12
=5:4
=4分之5
7.2:18
=72:180
=8:20
=2:5
=5分之2
12分之5:5
=5:60
=1:12
=12分之1
2:20分之1
=40:1
=40