解:(1)
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×(26×
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),
=
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×26×
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,
=6;
(2)
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×
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,
=
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×
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×
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,
=(
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)×
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,
=
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×
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,
=
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;
(3)
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÷(
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),
=
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÷
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,
=
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×
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,
=6;
(4)5
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-
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×
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,
=5×
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-
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×
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,
=7-
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,
=6
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;
(5)
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-(
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),
=
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-(
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×
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),
=
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-(
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),
=
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-
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,
=1-
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,
=
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;
(6)5-(
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÷
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+
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),
=5-(
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×
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+
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),
=5-(4+
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),
=5-4
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,
=
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.
分析:(1)去括號(hào)進(jìn)行計(jì)算即可;
(2)把除數(shù)轉(zhuǎn)化為乘它的倒數(shù),再運(yùn)用乘法分配律進(jìn)行簡(jiǎn)便計(jì)算;
(3)先算括號(hào)里的減法,再算括號(hào)外的除法;
(4)把除數(shù)轉(zhuǎn)化為乘它的倒數(shù),再運(yùn)用分?jǐn)?shù)四則混合運(yùn)算的運(yùn)算順序進(jìn)行計(jì)算;
(5)根據(jù)分?jǐn)?shù)四則混合運(yùn)算的運(yùn)算順序進(jìn)行計(jì)算,先算括號(hào)里的除法,然后去括號(hào)計(jì)算;
(6)根據(jù)分?jǐn)?shù)四則混合運(yùn)算的運(yùn)算順序進(jìn)行計(jì)算,先算括號(hào)里的除法,再算加法,最后算括號(hào)外的減法.
點(diǎn)評(píng):此題主要考查分?jǐn)?shù)四則混合運(yùn)算的順序,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.