解:(1)3.875×(10.3-0.775)÷
,
=
×(
-
)÷
=
×
×
×
,
=(
×
)×(
×
),
=1×
,
=
;
(2)5.42-11.1÷[19.2×5.2-5.2×14.6+5.4×3.7-4.6×1.5],
=5.42-11.1÷[(19.2-14.6)×5.2-+5.4×3.7-4.6×1.5],
=5.42-11.1÷[4.6×5.2+5.4×3.7-4.6×1.5],
=5.42-11.1÷[4.6×(5.2-1.5)+5.4×3.7],
=5.42-11.1÷[4.6×3.7+5.4×3.7],
=5.42-11.1÷[(4.6+5.4)×3.7],
=5.42-11.1÷(10×3.7),
=5.42-11.1÷37,
=5.42-0.3,
=5.12.
分析:(1)先把小數(shù)化成分?jǐn)?shù),再算小括號(hào)里面的減法,然后運(yùn)用乘法結(jié)合律簡(jiǎn)算;
(2)把中括號(hào)里面的計(jì)算多次運(yùn)用乘法分配律簡(jiǎn)算,再算括號(hào)外的除法,最后算括號(hào)外減法.
點(diǎn)評(píng):本題屬于較復(fù)雜的運(yùn)算,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.