(1)
4
9 ×
1
5 ÷
4
5 ,
=
4
9 ×
1
5 ×
5
4 ,
=
1
9 ;
(2)
4
5 ÷
2
3 ÷
5
6 ,
=
4
5 ×
3
2 ×
6
5 ,
=
36
25 ;
(3)(15-14×
4
7 )×
8
21 ,
=(15-8)×
8
21 ,
=7×
8
21 ,
=
8
3 ;
(4)
2
7 ×
8
9 +
5
7 ×
8
9 ,
=(
2
7 +
5
7 )×
8
9 ,
=1×
8
9 ,
=
8
9 ;
(5)
4
5 ÷[(
1
3 +
2
5 )×
4
11 ],
=
4
5 ÷[
11
15 ×
4
11 ],
=
4
5 ÷
4
15 ,
=
4
5 ×
15
4 ,
=3;
(6)
7
5 -
5
8 -
9
16 ÷
3
2 ,
=
7
5 -
5
8 -
9
16 ×
2
3 ,
=
7
5 -
5
8 -
3
8 ,
=
7
5 -(
5
8 +
3
8 ),
=
7
5 -1,
=
2
5 .