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问题: 简便运算

41.2×8.1+11×37/4+53.7×1.9

解答:

41.2×8.1+11×37/4+53.7×1.9
=53.7X(10-8.1)+41.2X8.1+11X37/4
=537-53.7X8.1+41.2X8.1+11X37/4
=537-(53.7-41.2)X8.1+11X37/4
=537-12.5X8.1+11X37/4
=537-(50X8.1-11X37)/4
=537-(-2)/4
=537+0.5
=537.5