考點(diǎn):整數(shù)、分?jǐn)?shù)、小數(shù)、百分?jǐn)?shù)四則混合運(yùn)算,運(yùn)算定律與簡便運(yùn)算
專題:運(yùn)算順序及法則,運(yùn)算定律及簡算
分析:(1)(3)(6)根據(jù)乘法分配律簡算即可;
(2)首先計(jì)算小括號(hào)里面的,然后計(jì)算中括號(hào)里面,最后計(jì)算中括號(hào)外面的即可;
(4)根據(jù)減法的性質(zhì)簡算即可;
(5)首先計(jì)算除法,然后根據(jù)減法的性質(zhì)計(jì)算即可.
解答:
解:(1)160.6×2
-0.6÷
=160.6×
-0.6×
=(160.6-0.6)×
=160×
=440
(2)2100÷[56×(
-
)]
=2100÷[56×
]
=2100÷3
=700
(3)2002×
=(2000+2)×
=2000×
+2×
=999+0.999
=999.999
(4)9
-(2
-
×
)
=9
-2
+
=7+
=7
(5)2-
÷
-
=2-
-
=2-(
+
)
=2-2
=0
(6)
×56
+44
×
-
=
×(56
+44
-1)
=
×100
=75
點(diǎn)評:此題主要考查了整數(shù)、分?jǐn)?shù)、小數(shù)四則混合運(yùn)算,注意運(yùn)算順序,注意乘法運(yùn)算定律的應(yīng)用.