考點(diǎn):分?jǐn)?shù)的簡便計(jì)算,運(yùn)算定律與簡便運(yùn)算,分?jǐn)?shù)的四則混合運(yùn)算
專題:運(yùn)算順序及法則,運(yùn)算定律及簡算
分析:(1)先算除法,再利用a-b-c=a-(b+c);
(2)運(yùn)用加法交換律和加法結(jié)合律計(jì)算;
(3)先算小括號里的,再算中括號的,最后算乘法;
(4)運(yùn)用乘法分配律計(jì)算;
(5)先算括號里的,再按算除法,最后算乘法.
(6)利用乘法分配律計(jì)算.
解答:
解:①14.6-3.43-1.14÷2
=14.6-3.43-0.57
=14.6-(3.43+0.57)
=14.6-4
=10.6
②
+3.9+
+6.1
=(
+
)+(3.9+6.1)
=1+10
=11
③
×[
-(
-
)]
=
×[
-
]
=
×
=
④3.6×45+36×5.5
=3.6×45+3.6×55
=3.6×(45+55)
=3.6×100
=360
⑤(
-0.4)÷
×
=0.2×
×
=
⑥
×101-
=0.6×(101-1)
=0.6×100
=60
點(diǎn)評: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.