(1)5.4×(86.5-16.25÷0.5),
=5.4×(86.5-32.5),
=5.4×54,
=291.6;
(2)3-
×3 2
-10 21
,2 7
=3-
-5 7
,2 7
=3-(
+5 7
),2 7
=3-1,
=2;
(3)95.6×18+4.4×18,
=(95.6+4.4)×18,
=100×18,
=1800;
(4)
+(15 16
-7 16
)÷1 4
,1 2
=
+15 16
÷3 16
,1 2
=
+15 16
,6 16
=
.21 16