Question

81.5×15.8﹢8.15×518﹢67.6×18.5= 这道题用简算怎么算 ???

Answer 1

您好：

81.5×15.8﹢8.15×518﹢67.6×18.5
=81.5x15.8+81.5x51.8+67.6x18.5
=81.5x(15.8+51.8)+67.6x18.5
=81.5x67.6+67.6x18.5
=67.6x(81.5+18.5)
=67.6x100
=6760

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Answer 2

81.5×15.8﹢8.15×518﹢67.6×18.5

=8.15×15.8×10+8.15×518+67.6×18.5
=8.15×158+8.15×518+67.6×18.5
=8.15×(158+518)+67.6×18.5
=8.15×676+67.6×18.5
=67.6×10×8.15+67.6×18.5
=67.6×81.5+67.6×18.5
=67.6×(81.5+18.5)
=67.6×100
=6760