求比值 60:42 4.8:7.5 3/8:9/20 3.5:82/5.
问题描述:
求比值
60:42
4.8:7.5
:3 8
9 20
3.5:8
. 2 5
答
(1)60:42,
=60÷42,
=
,10 7
(2)4.8:7.5,
=4.8÷7.5,
=
,16 25
(3)
:3 8
,9 20
=
÷3 8
,9 20
=
,5 6
(4)3.5:8
,2 5
=3.5÷8
,2 5
=3.5÷
,42 5
=
.5 12