(1)25×1.25×4,
=1.25×(25×4),
=1.25×100,
=125;
(2)(3.75+4.1+2.35)×0.8,
=(3.75+2.25+4.1)×0.8,
=(6+4.1)×0.8,
=6×0.8+4.1×0.8,
=4.8+3.28,
=8.08;
(3)1-
-5 12
,7 12
=1-(
+5 12
),7 12
=1-1,
=0;
(4)99×16+16,
=(99+1)×16,
=100×16,
=1600;
(5)10÷
+5 9
×18,2 3
=10×
+9 5
×18,2 3
=18+12,
=30;
(6)26.35÷6.2+14.5,
=4.25+14.5,
=18.75.