(1)5:4.5=(5×2):(4.5×2)=10:9;
5:4.5=10:9=10÷9=
10
9 .
(2)0.125:
7
8 =
1
8 :
7
8 =(
1
8 ×8):(
7
8 ×8)=1:7;
0.125:
7
8 =1:7=1÷7=
1
7 .
(3)
5
9 :
10
13 =(
5
9 ×117):(
10
13 ×117)=65:90=(65÷5):(90÷5)=13:18;
5
9 :
10
13 =13:18=13 ÷18=
13
18 .
(1)5:4.5=(5×2):(4.5×2)=10:9;
5:4.5=10:9=10÷9=
10
9 .
(2)0.125:
7
8 =
1
8 :
7
8 =(
1
8 ×8):(
7
8 ×8)=1:7;
0.125:
7
8 =1:7=1÷7=
1
7 .
(3)
5
9 :
10
13 =(
5
9 ×117):(
10
13 ×117)=65:90=(65÷5):(90÷5)=13:18;
5
9 :
10
13 =13:18=13 ÷18=
13
18 .