7.94+3.97×98(用简便方法计算)
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![7.94+3.97×98(用简便方法计算)](/uploads/image/z/1958170-58-0.jpg?t=7.94%2B3.97%C3%9798%EF%BC%88%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%89)
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7.94+3.97×98(用简便方法计算)
7.94+3.97×98(用简便方法计算)
7.94+3.97×98(用简便方法计算)
7.98+3.97×98=3.97×2+3.97×98
=3.97×﹙2+98﹚
=3.97×100
=397