小学生的题目大家做一做
69316.931*69.31=用简便方法做 要求有过程
参考答案:二楼正确,但中间有错
=(69310+6.931)*69.31
=(69.31*1000 + 69.31*0.1 )* 69.31
=(69.31^2 )*1000 + (69.31^2 )*0.1
=(69.31^2 )*(1000.01)
69316.931*69.31=用简便方法做 要求有过程
参考答案:二楼正确,但中间有错
=(69310+6.931)*69.31
=(69.31*1000 + 69.31*0.1 )* 69.31
=(69.31^2 )*1000 + (69.31^2 )*0.1
=(69.31^2 )*(1000.01)