解:
(1)2184-[(44×19+44)÷5],
=2184-[44×(19+1)÷5],
=2184-[44×20÷5],
=2184-[880÷5],
=2184-176,
=2008;
(2)450+(8.16+6.84)÷0.63,
=450+15÷0.63,
=450+23
,
=473
;
(3)
,
=
÷
+
,
=
+
,
=
;
(4)[1-(
+
)×2]÷
,
=[1-
×2]÷
,
=[1-
]÷
,
=
÷
,
=7;
(5)(4-7.5×
)÷
,
=(4-2)÷
,
=2÷
,
=9;
(6)
÷[(
+0.875)×
]-
,
=
÷[1.125×
]-
,
=
÷1-
,
=
-
,
=
.
分析:(1)小括號(hào)里面的根據(jù)乘法分配律進(jìn)行計(jì)算,再算除法,最后算減法;
(2)先算小括號(hào)里面的加法,再算除法,最后算括號(hào)外面的加法;
(3)先算小括號(hào)里面的加法,再算除法,最后算括號(hào)外面的加法
(4)先算加法,再算乘法,再算減法,最后算除法;
(5)先算乘法,再算減法,最后算除法;
(6)先算加法,再算乘法,再算除法,最后算減法.
點(diǎn)評(píng):此題主要考查分?jǐn)?shù)、整數(shù)、小數(shù)的四則混合運(yùn)算的運(yùn)算順序和應(yīng)用運(yùn)算定律進(jìn)行簡(jiǎn)便計(jì)算.