考點(diǎn):整數(shù)、分?jǐn)?shù)、小數(shù)、百分?jǐn)?shù)四則混合運(yùn)算
專題:運(yùn)算順序及法則
分析:(1)首先計(jì)算二級(jí)運(yùn)算,然后計(jì)算一級(jí)運(yùn)算即可;
(2)首先計(jì)算小括號(hào)里面的除法和加法,然后計(jì)算小括號(hào)外面的即可;
(3)首先計(jì)算小括號(hào)里面的,然后計(jì)算小括號(hào)外面的即可;
(4)(6)根據(jù)乘法分配律簡(jiǎn)算即可;
(5)首先計(jì)算小括號(hào)里面的,然后從左向右依次計(jì)算即可.
解答:
解:(1)894+450÷15×6.5
=894+30×6.5
=894+195
=1089
(2)0.9-(0.26+0.45÷
)
=0.9-(0.26+0.63)
=0.9-0.89
=0.01
(3)(
-
)×(1-
×
)
=
×(1-)=
×=
(4)2012×
=(2011+1)×
=2011×
+=2010+
=2010
(5)2704÷26×(112-98)
=2704÷26×14
=104×14
=1456
(6)3.7×2.36+7.3×2.36-2.36
=(3.7+7.3-1)×2.36
=10×2.36
=23.6
點(diǎn)評(píng):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.