如题所述
解:采用结合律和分配律
原式=42.3x3.6x3.75-42.3x1.25x8x0.2
=42.3x(1.9x2x3.75-10x0.2)
=42.3x(1.9x7.5-2)
=42.3x(14.25-2)
=42.3x12.25
=518.175
原式=42.3x3.6x3.75-42.3x1.25x8x0.2
=42.3x(1.9x2x3.75-10x0.2)
=42.3x(1.9x7.5-2)
=42.3x(14.25-2)
=42.3x12.25
=518.175
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