解:(1)0.35-10-(0.2+6.37÷0.7)×0.5,
=-9.65-(0.2+9.1)×0.5,
=-9.65-9.3×0.5,
=-9.65-4.65,
=-(9.65+4.65),
=-14.3;
(2)91×
+9÷13-1÷13×100,
=91×
+9×
-
×100,
=(91+9-100)×
,
=0×
,
=0;
(3)(
-
)×17-
,
=
×17-
×17-
,
=
-(
+
),
=
-1,
=
;
(4)53.5×1.9+61×1.25+41×8.1,
=53.5×(2-0.1)+(60+1)×1.25+(40+1)×8.1,
=53.5×2-53.5×0.1+60×1.25+1×1.25+40×8.1+1×8.1,
=107-5.35+75+1.25+324+8.1,
=(107+75+324)+(1.25-5.35+8.1),
=506+4,
=510;
(5)12×[(
+
)÷
],
=12×[
÷
],
=12×1,
=12;
( 6)
×
+56×
+
×
,
=
×7×
+56×
+
×
,
=(
+56+
)×
,
=63×
,
=7.
分析:(1)先算0.35-10=-9.65,再算括號(hào)內(nèi)的除法,然后算括號(hào)內(nèi)的加法,再算括號(hào)外的乘法,最后算減法;
(2)先把原式變?yōu)?1×
+9×
-
×100,然后運(yùn)用乘法分配律簡算;
(3)先運(yùn)用乘法分配律計(jì)算(
-
)×17,然后運(yùn)用減法的性質(zhì)簡算;
(4)把1.9看作2-0.1,,把61看作60+1,把41看作40+1,運(yùn)用乘法分配律簡算,在云用加法結(jié)合律簡算;
(5)先算小括號(hào)內(nèi)的,再算中括號(hào)內(nèi)的,最后算括號(hào)外的;
(6)先把原式變?yōu)?img class='latex' src='http://thumb.zyjl.cn/pic5/latex/113.png' />×7×
+56×
+
×
,然后運(yùn)用乘法分配律簡算.
點(diǎn)評(píng):考查了分?jǐn)?shù)、小數(shù)的四則混合運(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)算定律進(jìn)行簡便計(jì)算.