简算：2..25×1.8+1.25×0.18
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简算：2..25×1.8+1.25×0.18简算：2..25×1.8+1.25×0.18简算：2..25×1.8+1.25×0.182.25×1.8+1.25×0.18=2.25×1.8+1.25×1
简算：2..25×1.8+1.25×0.18
简算：2..25×1.8+1.25×0.18
简算：2..25×1.8+1.25×0.18
2.25×1.8+1.25×0.18 = 2.25×1.8+1.25×1.8/10 = 2.25×1.8+0.125×1.8 = (2.25 + 0.125 )*1.8 =2.375 * 1.8 =4.275
2.25*1.8+1.25*0.18
=2.25+2.25*0.8+0.125+1.25*0.08
=2.375+0.18+0.1
=2.655
(10*9+5*0.9)/20
=10.5/20
=2.1/4
=0.5025
简算：2..25×1.8+1.25×0.18
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