问题
解答题
|
答案
(1)1
吨:250千克,3 4
=1750千克:250千克,
=(1750÷250):(250÷250),
=7:1;
(2)0.25:4
,1 2
=0.25:4.5,
=(0.25×20):(4.5×20),
=5:90,
=1:18;
(3)
:5 9
,5 27
=(
×27):(5 9
×27),5 27
=15:5,
=3:1.
|
(1)1
吨:250千克,3 4
=1750千克:250千克,
=(1750÷250):(250÷250),
=7:1;
(2)0.25:4
,1 2
=0.25:4.5,
=(0.25×20):(4.5×20),
=5:90,
=1:18;
(3)
:5 9
,5 27
=(
×27):(5 9
×27),5 27
=15:5,
=3:1.