计算下面各题,能简算的要简算.
(+)×36×(-)?×11+?(+)(3-)×17.
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解:(1)(+)×,
=×+×,
=+,
=;
(2)36×(-),
=36×-36×,
=12-4.5,
=7.5;
(3)×11+,
=×(11+1),
=×12,
=7;
(4)××,
=×,
=;
(5)(+),
=×,
=;
(6)(3-)×17,
=3×17-×17,
=51-,
=50.
解析分析:(1)(2)(3)(6)运用乘法分配律简算;
(4)约分计算;
(5)先算括号内的,再算括号外的.
点评:此题考查了分数的四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.