1.8+18÷1.5-0.5×0.3和(0.63+7.638÷0.1)÷0.25的简便计算
问题描述:
1.8+18÷1.5-0.5×0.3和(0.63+7.638÷0.1)÷0.25的简便计算
答
1.8+1.8÷1.5-0.5×0.3 =1.8+18÷15-0.15 =1.8+1.2-0.15 =3-0.15 =2.85 (0.63+7.638÷0.1)÷0.25 =(0.63+76.38)÷0.25 =(63+7638)÷25 =7701÷25 =(7701×4)÷(25×4) =30804÷100 =308.04