分析:(1)根據(jù)整數(shù)四則混合運(yùn)算的運(yùn)算順序進(jìn)行計(jì)算即可得到答案;
(2)根據(jù)小數(shù)四則混合運(yùn)算的運(yùn)算順序進(jìn)行計(jì)算即可得到答案;
(3)按照小數(shù)、分?jǐn)?shù)四則混合運(yùn)算的運(yùn)算順序進(jìn)行計(jì)算即可得到答案;
(4)利用乘法分配律進(jìn)行計(jì)算即可得到答案.
解答:解:(1)2000-36×42÷14
=2000-108,
=1892;
(2)5.97+3.8×7.2-24.6
=5.97+27.36-24.6,
=33.33-24.6,
=8.73;
(3)1.25+(7.8×
-
)
=1.25+(1.95-0.6),
=1.25+1.35,
=2.6;
(4)(
+
)×27÷
=(
×27+
×27)÷
,
=(
+5)×39,
=
×39+5×39,
=54+195,
=249.
點(diǎn)評(píng):此題主要考查的是整數(shù)、小數(shù)、分?jǐn)?shù)四則混合運(yùn)算的運(yùn)算順序和簡(jiǎn)便運(yùn)算的應(yīng)用.