(1)原式=1×(-48)-
1
6 ×(-48)+
3
4 ×(-48)
=-48+8-36
=-76;
(2)原式=1×2-8÷4
=2-2
=0;
(3)原式=(
2
3 +
1
3 )-(
1
8 +
3
8 )
=1-
1
2
=
1
2 ;
(4)原式=-1 3-0.5×
1
3 ×(-7)
=-1-
1
6 ×(-7)
=-1+
7
6
=
1
6 .
(1)原式=1×(-48)-
1
6 ×(-48)+
3
4 ×(-48)
=-48+8-36
=-76;
(2)原式=1×2-8÷4
=2-2
=0;
(3)原式=(
2
3 +
1
3 )-(
1
8 +
3
8 )
=1-
1
2
=
1
2 ;
(4)原式=-1 3-0.5×
1
3 ×(-7)
=-1-
1
6 ×(-7)
=-1+
7
6
=
1
6 .