0.65加0.35乘1.8 简便计算
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0.65加0.35乘1.8 简便计算
![0.65加0.35乘1.8 简便计算](/uploads/image/z/5042126-38-6.jpg?t=0.65%E5%8A%A00.35%E4%B9%981.8+%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
0.65+0.35×1.8
=0.65+0.35×(1+0.8)
=0.65+0.35×1+0.35×0.8
=0.65+0.35+0.28
=1+0.28
=1.28
=0.65+0.35×(1+0.8)
=0.65+0.35×1+0.35×0.8
=0.65+0.35+0.28
=1+0.28
=1.28