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(0.75×42.7+57.3-0.573×25)÷3×7972=
199300
199300
分析:根据题意,把0.573×25变成57.3×0.25,由乘法分配律,逐步解答即可.
解答:解:(0.75×42.7+57.3-0.573×25)÷3×7972,
=(0.75×42.7+57.3-57.3×0.25)÷3×7972,
=[0.75×42.7+57.3×(1-0.25)]÷3×7972,
=[0.75×42.7+57.3×0.75]÷3×7972,
=[0.75×(42.7+57.3)]÷3×7972,
=0.75×100÷3×7972,
=75÷3×7972,
=25×7972,
=25×(4×1993),
=25×4×1993,
=100×1993,
=199300.
故答案为:199300.
点评:本题利用数字特点经过变换,巧用乘法分配律进行解答即可.
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