15.8*69.3-15.8*68.3如何用简便做?
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![15.8*69.3-15.8*68.3如何用简便做?](/uploads/image/z/762365-29-5.jpg?t=15.8%2A69.3-15.8%2A68.3%E5%A6%82%E4%BD%95%E7%94%A8%E7%AE%80%E4%BE%BF%E5%81%9A%3F)
15.8*69.3-15.8*68.3如何用简便做?
15.8*69.3-15.8*68.3如何用简便做?
15.8*69.3-15.8*68.3如何用简便做?
15.8*69.3-15.8*68.3
=15.8*(69.3-68.3)
=15.8*1
=15.8
=15.8*(69.3-68.3)
=15.8*1
=15.8
15.8*69.3-15.8*68.3
=15.8*(69.3-68.3)
=15.8*1
=15.8
15.8*69.3-15.8*68.3
=15.8*(69.3-68.3)
=15.8*1
=15.8