化简比.56:32= 1.8:0.09= 2 46 = 1 3 : 2 5 = 4.6:6.9=

化简比.56:32= 1.8:0.09= 2 46 = 1 3 : 2 5 = 4.6:6.9= 3 8 :0.25=

(1)56:32
=(56÷8):(32÷8)
=7:4;

(2)1.8:0.09
=(1.8×100):(0.09×100)
=180:9
=(180÷9):(9÷9)
=20:1;

(3)
2
46
=
(2÷2)
(46÷2)
=
1
23


(4)
1
3
2
5

=(
1
3
×15):(
2
5
×15)
=5:6;

(5)4.6:6.9
=(4.6×10):(6.9×10)
=46:69
=(46÷23):(69÷23)
=2:3;

(6)
3
8
:0.25
=
3
8
1
4

=(
3
8
×8):(
1
4
×8)
=3:2.
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