分析:(1)根據(jù)連減的性質(zhì)進(jìn)行計算;
(2)根據(jù)連除的性質(zhì)進(jìn)行計算;
(3)根據(jù)乘法分配律進(jìn)行計算;
(4)先算減法,再算乘法,最后算除法;
(5)根據(jù)乘法分配律進(jìn)行計算;
(6)根據(jù)乘法交換律和結(jié)合律進(jìn)行計算;
(7)先算加法,再算除法,最后算減法;
(8)根據(jù)乘法分配律進(jìn)行計算.
解答:解:
(1)
-(
+
),
=
-
-
,
=1-
,
=
;
(2)91-10÷0.25÷4,
=91-10÷(0.25×4),
=91-10÷1,
=91-10,
=81;
(3)
×
+
÷
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(4)35÷[
×(1-
)],
=35÷[
×
],
=35÷
,
=56;
(5)41×101,
=41×(100+1),
=41×100+41,
=4100+41,
=4141;
(6)5×
×
×
,
=(5×
)×(
×
),
=2×
,
=
;
(7)8.5-(5.6+4.8)÷1.3,
=8.5-10.4÷1.3,
=8.5-8,
=0.5;
(8)12×(
-
+
),
=12×
-12×
+12×
,
=3-4+2,
=1.
點(diǎn)評:考查了運(yùn)算定律與簡便運(yùn)算,四則混合運(yùn)算.注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算律簡便計算.