(1)0.125×0.25×8×4,
=(0.125×8)×(0.25×4),
=1×1,
=1;
(2)[5-1.7÷(2-1)]×1,
=[5-1.7÷1]×1,
=[5-1.7]×1,
=3.3×1,
=3.3;
(3)87×
,3 86
=(86+1)×
,3 86
=86×
+1×3 86
,3 86
=3+
,3 86
=3
;3 86
(4)
÷(4 9
+7 9
)×4 9
,11 4
=
÷4 9
×11 9
,11 4
=
×4 11
,11 4
=1;
(5)3.9÷1.5-2.3×0.5,
=2.6-1.15,
=1.45;
(6)1
÷1 2
-3 4
×5 8
,16 35
=2-
,2 7
=1
.5 7