问题
解答题
|
答案
(1)
:2 3
,4 15
=(
×15):(2 3
×15),4 15
=10:4,
=5:2;
:2 3
,4 15
=5:2,
=5÷2,
=
.5 2
(2)2.5:2.75,
=(2.5×20):(2.75×20),
=50:55,
=10:11;
2.5:2.75,
=10:11,
=10÷11,
=
.10 11
(3)0.5吨:25千克,
=500千克:25千克,
=(500÷25):(25÷25),
=20:1;
0.5吨:25千克,
=20:1,
=20÷1,
=20.
(4)0.6千米:180米,
=600米:180米,
=(600÷60):(180÷60),
=10:3;
0.6千米:180米,
=10:3,
=10÷3,
=
.10 3