分析:(1)先把17×25結(jié)合在一起,再運(yùn)用乘法分配律簡算;
(2)先算小括號里面的乘法,再算小括號里面的減法,然后算中括號里面的除法,再算中括號里面的加法,最后算括號外的除法;
(3)先根據(jù)帶分?jǐn)?shù)化成假分?jǐn)?shù)的方法,帶分?jǐn)?shù)進(jìn)行化簡,其中把分子運(yùn)用乘法分配律簡算,然后根據(jù)分?jǐn)?shù)除法的計(jì)算方法求解;
(4)先根據(jù)積不變規(guī)律把9999×2222變成3333×6666,再運(yùn)用乘法分配律簡算.
解答:解:(1)(
+
)×17×25,
=(
+
)×(17×25),
=(
×17×25)+(
×25×17),
=(4×25)+(1×17),
=100+17,
=117;
(2)8.1÷[(
4-0.005×700)÷
1+3],
=8.1÷[(
4-3.5)÷
1+3],
=8.1÷[
÷
1+3],
=8.1÷[
+3],
=8.1÷3
,
=
;
(3)1234÷
1234,
=1234÷
,
=1234÷
,
=1234÷
,
=1234×
,
=
;
(4)9999×2222+3334×3333,
=3333×6666+3334×3333,
=3333×(6666+3334),
=3333×10000,
=33330000.
點(diǎn)評:完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的簡便方法計(jì)算.