7.2×8.5+14×0.72+72×0.01(用简便方法做)
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7.2×8.5+14×0.72+72×0.01(用简便方法做)7.2×8.5+14×0.72+72×0.01(用简便方法做)7.2×8.5+14×0.72+72×0.01(用简便方法做)=7.2x8.
7.2×8.5+14×0.72+72×0.01(用简便方法做)
7.2×8.5+14×0.72+72×0.01(用简便方法做)
7.2×8.5+14×0.72+72×0.01(用简便方法做)
=7.2x8.5+7.2x1.4+7.2x0.1
=7.2x(8.5+1.4+0.1)
=7.2x10
=72
7.2*8.5+14*0.72+72*0.01简便方法算
7.2×8.5+14×0.72+72×0.01(用简便方法做)
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