×14÷(+)÷÷(+)÷÷1÷÷4×4-4×3.6÷÷(+)÷÷0.2×

发布时间:2020-08-07 22:56:59

×14÷(+)÷÷(+)÷÷1÷÷4×4-4×3.6÷÷(+)÷÷0.2×

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解:
(1)×14÷,
=÷×14,
=×14,
=2;

(2)(+)÷,
=÷,
=;

(3)÷(+),
=÷,
=;

(4)÷÷,
=÷,
=;

(5)1÷÷,
=100÷,
=10000;

(6)4×4-4,
=22-4,
=18;

(7)×3.6
=0.8×3.6,
=2.88;

(8)÷÷,
=÷,
=;

(9)(+)÷,
=(+)×,
=×+×,
=+1,
=;

(10)÷0.2×,
=×,
=.
解析分析:(1)根据乘法交换律进行简算;
(2)先算加法,再算除法;
(3)先算加法,再算除法;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)先算乘法,再算减法;
(7)把分数化成小数,然后再计算;
(8)按照从左向右的顺序进行计算;
(9)根据乘法分配律进行简算;
(10)按照从左向右的顺序进行计算.


点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
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