0.13+0.23+0.33+0.43+0.53+0.63+0.73+0.83+0.93=13,23,33……93为循环节

如何算0.13 0.23 0.33 0.43 .0.93=? (1+0.23+0.33)*(0.23+0.33+0.43)-(1+0.23+0.33+0.43)*(0.23+0.33)如何简便计算 计算:(0.12+0.22+0.32+0.42+0.52)/(0.13+0.23+0.33+0.43)=? 0.13+0.23+0.33+.+0.93简算 0.13+0.23+0.33+0.43+0.53+0.63+0.73+0.83+0.93=13,23,33……93为循环节 0.13,13的循环+0.23,23的循环+0.33,33的循环+.+0.93,93的循环＝?要写计算过程 请问该含量是否高岭土?铝53.25,硅21.32,铁0.53,钛1.25,钙0.13,镁0.23,钾0.43,钠0.26,酌减22.42,白度83.9.另,铝土和高岭土的联系与区别?谢. 4.3×0.23+0.43×5.5+11×0.86的简便算法 （-4又2/1）-{3又5/2-[-0.13-（-0.33）]}咋算.. 计算：（-4又1/2）-﹛3又2/5-[（-0.13）-（0.33）]﹜ 0.1+0.3+0.5+0.7+0.9+0.11+0.13+0.15+0.17+0.19+0.21+0.23+...0.99 四则运算0.04*0.13+0.04*0.17+0.26*(0.38*0.1+0.62*0.13)+0.3*(0.23*0.15+0.26*0.17+0.17*0.18+0.34*0.13)+0.07*0.14+0.15*0.13+0.15*0.06=龙泉大厦：0.04*0.13+0.04*0.17+0.26*(0.38*0.1+0.62*0.13)+0.3*(0.23*0.15+0.26*0.17+0.17*0.22+0.34*0.15)+0.07*0.07 Calculate the pH of each of the following solutions.(a) 0.13 M KNO2_______(b) 0.43 M NaOCl_______(c) 0.36 M NH4ClO4_______ 硅:61.4% 铁3.9% 钠0.4% 铝23.3% 镁0.33% 钾4.6% 钛0.23% 钙0.45% 请高手指教这种高岭土主要用途和价格 钾9.67钠2.3硅69.23铝19.21铁0.13钛0.02钙0.11镁0.33这种钾长石多少钱?不包运费. 奥数速算与巧算一、6.25X1.25X6.4二、0.1+0.3+···+0.9+0.11+0.13+0.15+···+0.97+0.99三、199.9X19.98-199.8X19.97四、23.75X3.987+6.013X92.07+6.832X39.87五、（1+0.12+0.23）X（0.12+0.23+0.34）-（1+0.12+0.23+0.34）X（0.12+0.23） 选择合适的方法计算下题0.23×11.3-0.13×2.3（这道题可以简算吗,如果可以简算,又该怎样简算?） 硅:65.4% 铁1.9% 钠0.4% 铝20.3% 镁0.33% 钾3.6% 钛0.23% 钙0.45% 请高手指教这种高岭土主要用途是做什么保定高岭土原矿：硅 :65.4%铁：1.9% 钠：0.4%铝：20.3%镁：0.33%钾：3.6%钛：0.23%钙：0.45%请高手指教