问题
解答题
化简下面各比. 21:35 0.36:0.2
|
答案
①21:35,
=(21÷7):(35÷7),
=3:5;
②0.36:0.2,
=(0.36×100):(0.2×100),
=36:20,
=(36÷4):(20÷4),
=9:5;
③
:1 8
,1 7
=(
×56):(1 8
×56),1 7
=7:8.
化简下面各比. 21:35 0.36:0.2
|
①21:35,
=(21÷7):(35÷7),
=3:5;
②0.36:0.2,
=(0.36×100):(0.2×100),
=36:20,
=(36÷4):(20÷4),
=9:5;
③
:1 8
,1 7
=(
×56):(1 8
×56),1 7
=7:8.