化简比. (1)12:16 (2)3/4:11/8 (3)4.5:2.7 (4)6/10:0.1
问题描述:
化简比. (1)12:16 | (2)
|
||||
(3)4.5:2.7 | (4)
|
答
(1)12:16,
=(12÷4):(16÷4),
=3:4;
(2)
:13 4
,1 8
=(
×8):(3 4
×8),9 8
=6:9,
=2:3;
(3)4.5:2.7,
=(4.5×10÷9):(2.7×10÷9),
=5:3;
(4)
:0.1,6 10
=0.6:0.1,
=(0.6×10):(0.1×10),
=6:1.