(1)原式=
1
2 -
1
3 +
1
3 -
1
4 +
1
4 -
1
5 +
1
2011 -
1
2012
=
1
2 -
1
2012
=
1005
2012 ;
(2)原式=-125-(-8-
2
5 ×
1
2 )
=-125-(-8-
1
5 )
=-125+8+
1
5
=-116
4
5 ;
(3)原式=(-10+
1
19 )×15
=-150+
15
19
=-149
4
19 ;
(4)原式=(-
1
36 )÷
15-28-24
36
=(-
1
36 )×(-
36
37 )
=
1
37 .