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102×20.03-1.25×20.03×0.8.
分析:根据乘法分配律的逆运算,同时提取20.03然后进行计算,计算出结果后把101看成(100+1)再次使用乘法分配律.
解答:解:102×20.03-1.25×20.03×0.8,
=20.03×(102-1.25×0.8),
=20.03×(102-1),
=20.03×101,
=20.03×(100+1),
=20.03×100+20.03×1,
=2003+20.03,
=2023.03;
点评:此题考查的目的是理解乘法分配律的逆运算,并且能够灵活运用乘法分配律进行简便计算.
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