(1)0.125×4.78×80
=0.125×80×4.78
=10×4.76
=47.6;
(2)2.8×3.6+1.4×2.8
=(3.6+1.4)×2.8
=5×2.8
=14;
(3)(0.4+40)×2.5
=0.4×2.5+40×2.5
=1+100
=101;
(4)78.7-17.7×3.6
=78.7-63.72
=14.98;
(5)18÷[0.3×(8-6.5)]
=18÷[0.3×1.5]
=18÷0.45
=40;
(6)1.02÷0.25
=(1.02×4)÷(0.25×4)
=4.08.