0.8888×0.6+0.2222×7.6注意:简便运算知道的请告诉偶啊Thank you

0.8888×0.6+0.2222×7.6注意:简便运算知道的请告诉偶啊Thank you

把7.6拆成4*1.9将4乘入0.2222.原式=0.8888*0.6+0.2222*4*1.9=0.8888*0.6+0.8888*1.9=0.8888*(0.6+1.9)=0.8888*2.5这时,已知25*4=100（简便方法）所以0.8888*2.5=0.2222*4*2.5=0.2222*10=2.222反正这道题是根据拆分和25*4的方法简便运算的,你也可以从第一步骤就直接为0.2222进行乘法分配律.祝提问者数学更上一层楼~加油哦~!======以下答案可供参考======供参考答案1:0.8888×0.6+0.2222×7.6 =0.2222*4*0.6+0.2222*7.6 =0.2222*(2.4+7.6)=0.2222*10 =2.222供参考答案2:0.8888×0.6+0.2222×7.6 =0.8888×0.6+0.2222×(7+0.6)=0.8888×0.6+0.2222×7+0.2222×0.6=0.6×(0.8888+0.2222)+0.2222×7=0.6×1.111+0.2222×7=0.6666+0.2222×7=0.6666+1.5554=2.2222供参考答案3:0.8888×0.6+0.2222×7.6 =0.2222*4*0.6+0.2222*7.6=0.2222*10=2.222供参考答案4:0.8888×0.6+0.2222×7.6=0.8888×0.6+0.2222×(7+0.6)=0.8888×0.6+0.2222×7+0.2222×0.6=0.6×(0.8888+0.2222)+0.2222×7=0.6×1.111+0.2222×7=0.6×0.2222×5+0.2222×7=0.2222×(0.6×5+7)=0.2222×10=2.222这道题的重点就是(1)把7.6分为7+0.6;(2)把1.111分为0.2222×5供参考答案5:0.8888×0.6+0.2222×7.6 =0.2222*4*0.6+0.2222*7.6 =0.2222*2.4+0.2222*7.6=0.2222*(2.4+7.6)=0.2222*10=2.222供参考答案6:0.8888×0.6+0.2222×7.6 =0.2222×4×0.6+0.2222×7.6=0.2222×(4×0.6+7.6)=0.2222×(2.4+7.6)=0.2222×10=2.222供参考答案7:0.8888×0.6+0.2222×7.6 =0.2222*4*0.6+0.2222*7.6=0.2222*10=2.222

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