化简比2/3:2/5,3.6:2.7,0.45:0.9,2/15:4/15 ,3/4:9/16 ,0.2:2/3和化简步骤

问题描述:

化简比2/3:2/5,3.6:2.7,0.45:0.9,2/15:4/15 ,3/4:9/16 ,0.2:2/3
和化简步骤

2/3:2/5,
=2/3*5/2
=5/3
=5:3
3.6:2.7,
=0.9*4:0.9*3
=4:3
0.45:0.9,
=0.09*5:0.09*10
=5:10
=1:2
2/15:4/15 ,
=2/15*15/4
=2/4
=1/2
=1:2
3/4:9/16 ,
=3/4*16/9
=4/3
=4:3
0.2:2/3
=1/5:2/3
=1/5*3/2
=3/10
=3:10

5:3
4:3
1:2
1:2
4:3
3:10

(1)前后项同时乘15,2/3:2/5=10:6=5:3
(2)前后项同时乘10,3.6:2.7=36:27=4:3
(3)前后项同时乘20,0.45:0.9=9:18=1:2
(4)前后项同时乘15,2/15:4/15=2:4=1:2
(5)前后项同时乘16,3/4:9:16=12:9=4:3
(6)前后项同时乘15,0.2:2/3=3:10