(1)
9
20 ×
1
3 ÷
6
5 ,
=
3
20 ×
5
6 ,
=
1
8 ;
(2)
1
4 ÷
2
3 ÷
7
8
=
1
4 ×
3
2 ×
8
7 ,
=
3
7 ;
(3)
2
5 ×
4
7 +
3
5 ÷
7
4
=
2
5 ×
4
7 +
3
5 ×
4
7 ,
=(
2
5 +
3
5 )×
4
7 ,
=1×
4
7 ,
=
4
7 ;
(4)
1
3 +3÷
3
2
=
1
3 +3×
2
3 ,
=
1
3 +2,
=2
1
3 ;
(5)36÷(
3
5 ÷
1
10 )
=36÷(
3
5 ×10),
=36÷6,
=6;
(6)
2
5 ÷
8
15 ×
1
10 .
=
2
5 ×
15
8 ×
1
10 ,
=
3
40 .