问题
解答题
化简比. 7
12.6:0.4
|
答案
(1)7
:0.24,1 5
=
:36 5
,6 25
=
÷36 5
,6 25
=
×36 5
,25 6
=30:1;
(2)12.6:0.4,
=(12.6×10):(0.4×10),
=126:4,
=(126÷2):(4÷2),
=63:2;
(3)
:1 20
,4 5
=
÷1 20
,4 5
=
×1 20
,5 4
=
;1 16
(4)
小时:30分1 3
=20分:30分,
=20:30,
=(20÷10):(30÷10),
=2:3;
故答案为:30:1,63:2,
,2:3.1 16