6.4乘以88.8-7.88乘以0.64简便运算？
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6.4x88.8-7.88x0.64
=6.4x88.8-0.788x6.4
=6.4x(88.8-0.788)
=6.4x88.012
=6.4x80+6.4x8+6.4x0.01+6.4x0.002
=512+51.2+0.064+0.0128
=563.2768。
=6.4x88.8-0.788x6.4
=6.4x(88.8-0.788)
=6.4x88.012
=6.4x80+6.4x8+6.4x0.01+6.4x0.002
=512+51.2+0.064+0.0128
=563.2768。
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