解:(1)
×(26×
),
=
×26×
,
=6;
(2)
×
,
=
×
×
,
=(
)×
,
=
×
,
=
;
(3)
÷(
),
=
÷
,
=
×
,
=6;
(4)5
-
×
,
=5×
-
×
,
=7-
,
=6
;
(5)
-(
),
=
-(
×
),
=
-(
),
=
-
,
=1-
,
=
;
(6)5-(
÷
+
),
=5-(
×
+
),
=5-(4+
),
=5-4
,
=
.
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: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)用合適的簡便方法計(jì)算.