0.8+0.88+0.888+0.8888+0.2222(简便）
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0.8+0.88+0.888+0.8888+0.2222(简便）0.8+0.88+0.888+0.8888+0.2222(简便）0.8+0.88+0.888+0.8888+0.2222(简便）0.8+
0.8+0.88+0.888+0.8888+0.2222(简便）
0.8+0.88+0.888+0.8888+0.2222(简便）
0.8+0.88+0.888+0.8888+0.2222(简便）
0.8+0.88+0.888+0.8888+0.2222
=0.8+0.88+0.888+0.8888+0.2+0.02+0.002+0.0002
=(0.8+0.2)+(0.88+0.02)+(0.888+0.002)+(0.8888+0.0002)
=0.9+0.9+0.89+0.889
=0.9+0.9+0.9-0.01+0.9-0.011
=0.9×4-0.021
=3.6-0.021
=3.579
0.8,0.88,0.888.求通项公式
0.8+0.88+0.888+0.8888+.+0.88888888
0.8+0.88+0.888+0.8888+0.88888+0.888888
0.8+0.88+0.888+0.8888+0.2222(简便）
0.8＋0.88= 0.8＋0.88＋0.888= 0.8＋0.88＋0.888＋0.8888= 0.8＋0.88＋0.888＋0.8888＋……＋0.8888888=0.8＋0.88=0.8＋0.88＋0.888=0.8＋0.88＋0.888＋0.8888=0.8＋0.88＋0.888＋0.8888＋……＋0.8888888=
0.8,0.88,0.888,0.8888.的通项公式.谢
求数列 0.8,0.88,0.888…的通项公式
数列0.8,-0.88,0.888,-0.8888的通项公式
根据前三题的得数,直接写出第四题的答案0.8+0.88=1.68,0.8+0.88+0.888=2.568,0.8+0.88+0.888+0.8888=3.4568,0.8+0.88+0.888+0.（8···8）8个=（ ）,小刚在计算3.29加上一个两位小数时,由于马虎,将后一个两位小数的
根据数列的前n项写出数列的一个通项 （1）-1,-7,-13,19.（2）0.8,0.88,0.888.
0.888*0.8+0.111*3.6的简便计算是什么?
0.888*0.8+0.111*1.6简便方法怎么算
0.888*12.5*0.9+0.01
写出下面数列的一个通项公式,使它的前4项分别是下列各数-1,3/2,-1/3,3/4(2)-1,7,-13,19(3)0.8,0.88,0.888
0.888*125*73+999*3
计算,能简算的就简算：0.888*125*73+999*73 0.8+63*45+36*80％ （19+19^2）*0.01
0.444×2.4+3.8×0.888怎么简算
0.888×0.9+0.222×6.4 简便运算