(1)(
)×36,
=
×36+
×36+
×36,
=12+6+4,
=22;
(2)5.28-(2.56+0.44)+1.72,
=5.28+1.72-3,
=7-3,
=4;
(3)
,
=(
)×
,
=1×
,
=
;
(4)25×12.5×32,
=24×4×12.5×8,
=100×100,
=10000;
(5)(5-4.75)÷(2×2.5-3),
=0.25÷2,
=0.125,
(6)27÷7+43×(1-
),
=
,
=
,
=10;
分析:算式(1)、(3)運(yùn)用乘法的分配律進(jìn)行計(jì)算,這樣計(jì)算會(huì)更加簡(jiǎn)便.
算式(2)、(5)、(6)運(yùn)用分?jǐn)?shù),小數(shù)的四則混合運(yùn)算的順序進(jìn)行計(jì)算,有括號(hào)的先計(jì)算括號(hào)內(nèi)部的,最后計(jì)算括號(hào)外面的.
算式(4)運(yùn)用乘法的結(jié)合律及交換律進(jìn)行計(jì)算,是計(jì)算更加簡(jiǎn)便.
點(diǎn)評(píng):完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的簡(jiǎn)便方法計(jì)算