(1)(
3
4 -
5
8 )×
4
15 ,
=
1
8 ×
4
15 ,
=
1
30 ;
(2)
3
5 ÷(
4
15 ÷
8
9 ),
=
3
5 ÷
3
10 ,
=2;
(3)
1
8 ÷[(
3
8 -
1
6 )×
3
5 ],
=
1
8 ÷[
5
24 ×
3
5 ],
=
1
8 ÷
1
8 ,
=1;
(4)
5
6 +
2
9 ÷
2
3 ,
=
5
6 +
1
3 ,
=
7
6 ;
(5)
15
16 ×(
1
6 +
1
4 )÷
15
16 ,
=
15
16 ×
5
12 ×
16
15 ,
=(
15
16 ×
16
15 )×
5
12 ,
=1×
5
12 ,
=
5
12 ;
(6)[
2
5 -(
1
2 -
2
5 )]÷
3
2 ,
=[
2
5 -
1
10 ]÷
3
2 ,
=
3
10 ÷
3
2 ,
=
1
5 .