計(jì)算下面各題,能簡便的要用簡便運(yùn)算
(1)5044÷26×27
(2)47×99+47
(3)326+437+174+663
(4)(40+6)×25
(5)88×25
(6)6080÷[(416+24×8)÷8].
解:(1)5044÷26×27,
=194×27,
=5238;
(2)47×99+47,
=47×(99+1),
=47×100,
=4700;
(3)326+437+174+663,
=(326+174)+(437+663),
=500+1100,
=1600;
(4)(40+6)×25,
=40×25+6×25,
=1000+150,
=1150;
(5)88×25,
=(22×4)×25,
=22×(4×25),
=22×100,
=2200;
(6)6080÷[(416+24×8)÷8],
=6080÷[(416+192)÷8],
=6080÷[608÷8],
=6080÷608×8,
=10×8,
=80.
分析:(1)按照從左到右的順序計(jì)算;
(2)運(yùn)用乘法分配律簡算;
(3)運(yùn)用加法交換了和結(jié)合律簡算;
(4)運(yùn)用乘法分配律簡算;
(5)先把88分解成22×4,再運(yùn)用乘法結(jié)合律簡算;
(6)先算小括號里面的乘法,再算小括號里面的加法,然后根據(jù)除法的性質(zhì)簡算.
點(diǎn)評:本題考查了四則混合運(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.