(1)410-
-1 7
-2 7
,4 7
=410-(
+1 7
+2 7
),4 7
=410-1,
=409;
(2)8×
+8×3 5
+8,2 5
=8×(
+3 5
+1),2 5
=8×2,
=16;
(3)5+0.45÷0.9-1.75,
=5+0.5-1.75,
=5.5-1.75,
=3.75;
(4)1110÷[56×(
-3 7
)],3 8
=1110÷[56×
-56×3 7
],3 8
=1110÷[24-21],
=1110÷3,
=370.