Question

81.5x15.8+81.5x51.8+6.75x18.5的简便运算？

Answer 1

81.5x15.8+81.5x51.8+6.75x18.5的简便运算？
81.5x15.8+81.5x51.8+6.75x18.5
=81.5x(15.8+51.8)+6.75x18.5
=81.5x67.6+6.75x18.5
=8.15x(675+1)+675x0.185
=675x(8.15+0.185)+8.15
=675x8.335+8.15
=675x8+675x0.4-675x0.065+8.15
=5400+270+8.15-675x0.04-675x0.025
=5678.15-27-675/40
=5651.15-16.875
=5634.275

Answer 2

81.5x15.8+81.5x51.8+6.75x18.5
=81.5x（15.8+51.8）+6.75x18.5
=81.5x67.6+6.75x18.5
=81.5x67.5+81.5x0.1+67.5x1.85
=67.5x（81.5+1.85）+81.5x0.1
=67.5x83.35+8.15
=5626.125+8.15
=5634.275

Answer 3

81.5*67.6+6.75*18.5=

Answer 4

这道题的简便计算方法是：81.5*15.8+81.5*51.8+6.75*18.5=81.5（15.8+51.8）+6.75*18.5=81.5*67.6+6.75*18.5=815（6.75+0.01）+6.75*18.5=6.75（815+18.5）+8.15=6.75*833.5+8.15=6022.275。

Answer 5

81.5×15.8+81.5×51.8+6.75×18.5

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=81.5×(15.8+51.8)+6.75×18.5

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=81.5×67.6+124.875

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=5509.4+124.875

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=5634.275