99.99乘77.78+33.33乘66.66用简便计算怎么算
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![99.99乘77.78+33.33乘66.66用简便计算怎么算](/uploads/image/z/66431-47-1.jpg?t=99.99%E4%B9%9877.78%2B33.33%E4%B9%9866.66%E7%94%A8%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E6%80%8E%E4%B9%88%E7%AE%97)
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99.99乘77.78+33.33乘66.66用简便计算怎么算
99.99乘77.78+33.33乘66.66用简便计算怎么算
99.99乘77.78+33.33乘66.66用简便计算怎么算
上式=99.99×(77.78+22.22)=99.99×100=9999
99.99×77.78+33.33×66.66
=99.99×77.78+99.99×22.22
=99.99×(77.78+22.22)
=99.99×100
=9999
33.33乘三分之二,66.66除以三分之二,就得到这样的式子:
99.99×77.78+22.22×99.99
=99.99×(77.78+22.22)
=99.99×100
=9999
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