问题
解答题
化简比.
|
答案
(1)1.25:4.5,
=(1.25×100):(4.5×100),
=125:450,
=(125÷25):(450÷25),
=5:18;
(2)7:
,7 8
=(7×8):(
×8),7 8
=56:7,
=(56÷7):(7÷7),
=8:1;
(3)
:17 15
,7 5
=(
×15):(7 15
×15),12 5
=7:36;
(4)
:3 8
,1 3
=(
×24):(3 8
×24),1 3
=9:8.