(1)原式=23+3-37-52=26-89=-63;
(2)原式=
1
6 ×30×(-5)=
1
6 ×30×5=30;
(3)原式=-48+
1
6 ×48-
3
4 ×48=-48+8-36=-84+8=-76;
(4)原式=-4÷(-64)+0.2×
25
4
=
1
16 +
5
4
=
21
16 .
(1)原式=23+3-37-52=26-89=-63;
(2)原式=
1
6 ×30×(-5)=
1
6 ×30×5=30;
(3)原式=-48+
1
6 ×48-
3
4 ×48=-48+8-36=-84+8=-76;
(4)原式=-4÷(-64)+0.2×
25
4
=
1
16 +
5
4
=
21
16 .