分析:(1)可將136拆分為135+1后,根據(jù)乘法分配律計(jì)算;
(2)可根據(jù)乘法算式的性質(zhì)將題目中的乘法變?yōu)榫哂邢嗤驍?shù)2001與3.14的算式后,再將2001拆分為2000+1進(jìn)行計(jì)算;
(3)(6)根據(jù)四則混合運(yùn)算的運(yùn)算順序計(jì)算即可,先算乘除,再算加減,有括號的要先算括號里面的;
(4)可將999拆分為333×3后再根據(jù)乘法結(jié)合律、分配律計(jì)算;
(5)可將36.1÷0.8變?yōu)?6.1×1.25后,將2.63×12.5變化26.3×1.25后再根據(jù)乘法分配律計(jì)算.
解答:解:(1)136×
=(135+1)×
,
=135×
+1×
,
=2+
,
=2
;
(2)2001×3.14+200.1×31.4+20.01×314
=2001×3.14+2001×3.14+2001×3.14,
=2001×3.14×3,
=(2000+1)×9.42,
=2000×9.42+1×9.42,
=18840+9.42,
=18849.42;
(3)
-[(
+
)×
]
=
-[
×
],
=
-
,
=
;
(4)333×334+999×222
=333×334+333×(3×222),
=333×334+333×666,
=333×(334+666),
=333×1000,
=333000.
(5)1.25×17.6+36.1÷0.8+2.63×12.5
=1.25×17.6+36.1×1.25+26.3×1.25,
=(17.6+36.1+26.3)×1.25,
=80×1.25,
=100;
(6)
1÷(
+2.5×
)
=1
÷(
+2),
=
÷
,
=
.
點(diǎn)評:完成本題要細(xì)心分析題目中數(shù)據(jù)的特點(diǎn)及內(nèi)在聯(lián)系,然后運(yùn)用合適的方法進(jìn)行計(jì)算.