问题
解答题
化简下列各比: 48:64 4.5:6.9
220cm:1.1m 1.5升:720毫升 15:30:20
1天:18小时:360分. |
答案
(1)48:64
=(48÷16):(64÷16),
=3:4;
(2)4.5:6.9,
=(4.5×10):(6.9×10),
=45:69,
=(45÷3):(69÷3),
=15:23;
(3)
:14 3
,1 7
=
:4 3
,8 7
=(
×4 3
):(21 4
×8 7
),21 4
=7:6;
(4)220cm:1.1m,
=220cm:110cm,
=220:110,
=(220÷110):(110÷110),
=2:1;
(5)1.5升:720毫升,
=1500毫升:720毫升,
=1500:720,
=(1500÷60):(720÷60),
=25:12;
(6)15:30:20,
=(15÷5):(30÷5):(20÷5),
=3:6:4;
(7)
:1 2
:2 3
;5 6
=(
×6):(1 2
×6):(2 3
×6),5 6
=3:4:5;
(8)1天:18小时:360分,
=24小时:18小时:6小时,
=24:18:6,
=(24÷6):(18÷6):(6÷6),
=4:3:1.