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4500-900÷81×54+400简便运算
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4500-900÷81×54+400 简便运算
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4500-900÷81×54+400
=4500-900×54÷81+400
=4500-9×100×6×9÷81+400
=4500-600+400
=3900+400
=4300
=4500-900×54÷81+400
=4500-9×100×6×9÷81+400
=4500-600+400
=3900+400
=4300
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