(1)
5
17 ÷
2
3 +
1
3 ÷
3
3 ,
=
15
34 +
1
3 ,
=
79
102 ;
(2)
8
15 ÷[
5
32 ×(
9
10 +
1
6 )],
=
8
15 ÷[
5
32 ×
32
30 ],
=
8
15 ÷
1
6 ,
=
16
5 ;
(3)(
2
39 +
2
51 )×13+25÷51,
=
2
39 ×13+
2
51 ×13+
25
51 ,
=
2
3 +
26
51 +
25
51 ,
=
2
3 +(
26
51 +
25
51 ),
=
2
3 +1,
=1
2
3 .