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计算下面各题能简便的就简便.6.54×1.2%1.87 12.5x...

解释 3.17+0.4ⅹ1.6

解答:解:①6.54×1.2-1.87=7.848-1.87=5.978②2.5×32×0.125=(2.5×4)×(8×0.125)=10×1=10③1.4×3.5-2.3×0.9=4.9-2.07=2.83④13.65÷0.25÷4=13.65÷(0.25×4)=13.65÷1=13.65⑤3.6÷0.25=3.6×4=14.4⑥4.9×99=4.9×(100-1)=490-4.9=485.1

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