问题
解答题
化简比.
|
答案
0.2:5,
=(0.2×5):(5×5),
=1:25;
:1 2
,3 4
=(
×4):(1 2
×4),3 4
=2:3;
21:15,
=(21÷3):(15÷3),
=7:5.
化简比.
|
0.2:5,
=(0.2×5):(5×5),
=1:25;
:1 2
,3 4
=(
×4):(1 2
×4),3 4
=2:3;
21:15,
=(21÷3):(15÷3),
=7:5.