(1)(
3
4 -
1
2 )÷
5
8
=
1
4 ×
8
5
=
2
5 ;
(2)960-630÷18×17
=960-35×17
=960-595
=365;
(3)
5
9 ×
3
7 ÷
5
8
=
5
9 ×
3
7 ×
8
5
=
8
21 ;
(4)
11
10 ×[1÷(
4
5 -
1
4 )]
=
11
10 ×[1÷
11
20 ]
=
11
10 ×
20
11
=2.
(1)(
3
4 -
1
2 )÷
5
8
=
1
4 ×
8
5
=
2
5 ;
(2)960-630÷18×17
=960-35×17
=960-595
=365;
(3)
5
9 ×
3
7 ÷
5
8
=
5
9 ×
3
7 ×
8
5
=
8
21 ;
(4)
11
10 ×[1÷(
4
5 -
1
4 )]
=
11
10 ×[1÷
11
20 ]
=
11
10 ×
20
11
=2.