计算,能简算的要简算. 25×600×20%+.
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解:(1)(+)÷,
=(+)×,
=×+×,
=+1,
=2;
(2)25×,
=(25×)×(×),
=10×1,
=10;
(3)÷÷,
=×(×),
=×1,
=;
(4)×+×0.375,
=(+)×0.375,
=1×0.375,
=0.375;
(5)600×20%+,
=120+3,
=123.
解析分析:(1)先把除法变成乘法,再运用乘法分配律简算;
(2)运用乘法交换律和乘法结合律简算;
(3)先把除法变成乘法,再运用乘法结合律简算;
(4)运用乘法分配律简算;
(5)同时运算乘法和除法,再算加法.
点评:本题考查了四则混合运算,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.