问题
解答题
先化简比再求比值: (1)42:28 (2)0.5:0.15 (3)
(4)
|
答案
(1)42:28,
=(42÷14):(28÷14),
=3:2;
42:28,
=3:2,
=3÷2,
=
;3 2
(2)0.5:0.15,
=(0.5×20):(0.15×20),
=10:3;
0.5:0.15,
=10:3,
=10÷3,
=
;10 3
(3)
:7 8
,5 6
=(
×24):(7 8
×24),5 6
=21:20;
:7 8
,5 6
=21:20,
=21÷20,
=
;21 20
(4)
小时:40分,2 3
=40分:40分,
=1:1;
小时:40分,2 3
=1:1,
=1÷1,
=1.