用简便方法计算:5.6×2.9+3.1×5.6-2.8×2 怎么算?
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![用简便方法计算:5.6×2.9+3.1×5.6-2.8×2 怎么算?](/uploads/image/z/637328-56-8.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%3A5.6%C3%972.9%2B3.1%C3%975.6-2.8%C3%972+%E6%80%8E%E4%B9%88%E7%AE%97%3F)
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用简便方法计算:5.6×2.9+3.1×5.6-2.8×2 怎么算?
用简便方法计算:5.6×2.9+3.1×5.6-2.8×2 怎么算?
用简便方法计算:5.6×2.9+3.1×5.6-2.8×2 怎么算?
5.6×2.9+3.1×5.6-2.8×2
=5.6×2.9+3.1×5.6-5.6
=5.6×(2.9+3.1-1)
=5.6×5
=28