用简便方法计算: 15.6×13.1+15.6×6.9 = =用简便方法计算: 15.6×13.1+15.6×6.9 = = =
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![用简便方法计算: 15.6×13.1+15.6×6.9 = =用简便方法计算: 15.6×13.1+15.6×6.9 = = =](/uploads/image/z/240075-27-5.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%9A+15.6%C3%9713.1%EF%BC%8B15.6%C3%976.9+%EF%BC%9D+%EF%BC%9D%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%9A+++++++15.6%C3%9713.1%EF%BC%8B15.6%C3%976.9++++%EF%BC%9D++++%EF%BC%9D++++%EF%BC%9D)
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用简便方法计算: 15.6×13.1+15.6×6.9 = =用简便方法计算: 15.6×13.1+15.6×6.9 = = =
用简便方法计算: 15.6×13.1+15.6×6.9 = =
用简便方法计算:
15.6×13.1+15.6×6.9
=
=
=
用简便方法计算: 15.6×13.1+15.6×6.9 = =用简便方法计算: 15.6×13.1+15.6×6.9 = = =
15.6×13.1+15.6×6.9
=15.6×(13.1+6.9)
=15.6×20
=312