如题所述
7.15X2.5X18-1.25X28X7.15
=7.15x(2.5x18-1.25x2x14)
=7.15x(2.5x18-2.5x14)
=7.15x2.5x(18-14)
=7.15x2.5x4
=7.15x10
=71.5
谢谢,请采纳
=7.15x(2.5x18-1.25x2x14)
=7.15x(2.5x18-2.5x14)
=7.15x2.5x(18-14)
=7.15x2.5x4
=7.15x10
=71.5
谢谢,请采纳
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