问题
解答题
化简比.
|
答案
:3 7
,5 21
=(
×21):(3 7
×21),5 21
=9:5;
7.5:0.75,
=(7.5×100):(0.75×100),
=750:75,
=(750÷75):(75÷75),
=10:1;
:3 4
,8 15
=(
×60):(3 4
×60),8 15
=45:32.
化简比.
|
:3 7
,5 21
=(
×21):(3 7
×21),5 21
=9:5;
7.5:0.75,
=(7.5×100):(0.75×100),
=750:75,
=(750÷75):(75÷75),
=10:1;
:3 4
,8 15
=(
×60):(3 4
×60),8 15
=45:32.