求比值16:20 2:1/4 4.5:6
问题描述:
求比值16:20 2:1/4 4.5:6
答
4:5 1:1/8 3:4
答
16:20=40.8
2:1/4 =8
4.5:6=0.75
答
16:20=4:5=0.8
2:1/4=2×4=8
4.5:6=3:4=0.75