34.5x76.5一345x6.42一123x1.45用简便方法计算。
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2016-04-15
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34.5x76.5-345x6.42-123x1.45
=34.5x(76.5-64.2)-123x1.45
=34.5x12.3-123x1.45
=12.3x(34.5-10x1.45)
=12.3x20
=246
=34.5x(76.5-64.2)-123x1.45
=34.5x12.3-123x1.45
=12.3x(34.5-10x1.45)
=12.3x20
=246
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34.5x76.5一345x6.42一123x1.45
=34.5×76.5-34.5×64.2-123×1.45
=34.5×(76.5-64.2)-123×1.45
=34.5×12.3-12.3×14.5
=12.3×(34.5-14.5)
=12.3×20
=246
=34.5×76.5-34.5×64.2-123×1.45
=34.5×(76.5-64.2)-123×1.45
=34.5×12.3-12.3×14.5
=12.3×(34.5-14.5)
=12.3×20
=246
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34.5x76.5一345x6.42一123x3.45
=3.45×765-3.45×642-123×3.45
=3.45×(765-642-123)
=3.45×0
=0
=3.45×765-3.45×642-123×3.45
=3.45×(765-642-123)
=3.45×0
=0
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