(1)(
3
10 +
1
4 )÷
2
5 ,
=
11
20 ×
5
2 ,
=
11
8 ;
(2)
4
7 ÷6+
3
7 ×
1
6 ,
=
4
7 ×
1
6 +
3
7 ×
1
6 ,
=(
4
7 +
3
7 )×
1
6 ,
=
1
6 ;
(3)(
5
6 +
3
8 )÷(
5
6 -
3
8 ),
=
29
24 ÷
11
24 ,
=
29
24 ×
24
11 ,
=
29
11 ;
(4)
2
3 ÷[(
4
5 -
1
4 )×15],
=
2
3 ÷[
11
20 ×15],
=
2
3 ÷
33
4 ,
=
2
3 ×
4
33 ,
=
8
99 .