为什么3分之一不等于0.9999999.等于1

1个回答

（1）设0.9999999.=x10x = 9 + 0.9999999.10x = 9+x9x = 9x = 9/9 = 1即;0.9999999.=9/9=1（2）设0.3333333…… = y10y=3+0.333333……10y = 3+y9y = 3y= 3/9 = 1/3即：0.333333…… = 3/9 = 1/3这是把循环小数化为...