用简便算法计算 146.75-99.2= 156.8+43.98=
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![用简便算法计算 146.75-99.2= 156.8+43.98=](/uploads/image/z/131286-30-6.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%E8%AE%A1%E7%AE%97+146.75-99.2%3D+156.8%2B43.98%3D)
用简便算法计算 146.75-99.2= 156.8+43.98=
用简便算法计算 146.75-99.2= 156.8+43.98=
用简便算法计算 146.75-99.2= 156.8+43.98=
146.75-99.2=146.75-100+0.8=47.55
156.8+43.98=156.8+43.2+0.78=200+0.78=200.78