问题
解答题
|
答案
(1)14:21,
=14÷21,
=
;2 3
14:21,
=(14÷7):(21÷7),
=2:3.
(2)
:9 11
,3 22
=
÷9 11
,3 22
=6;
:9 11
,3 22
=(
×22):(9 11
×22),3 22
=18:3,
=6:1.
(3)6:
,1 6
=6÷
,1 6
=36;
6:
,1 6
=(6×6):(
×6),1 6
=36:1.
(4)0.5:2.5,
=0.5÷2.5,
=0.2;
0.5:2.5,
=(0.5×2):(2.5×2),
=1:5.