81/1+81/3+81/5+81/7+81/9+81/11+81/13+81/15+81/17＝

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/11/07 23:57:45

81/1+81/3+81/5+81/7+81/9+81/11+81/13+81/15+81/17＝
简便计算,

81/1+81/3+81/5+81/7+81/9+81/11+81/13+81/15+81/17
=(81/1+81/17）×9÷2
=9/2×9÷2
=1

81/1+81/3+81/5+81/7+81/9+81/11+81/13+81/15+81/17＝ 81 (-1/81)/1/81)*(-1)-(11/8+7/3-15/4)*(-24) (-1/81)/1/81)*(-1)- 81*18+81+81*81简便运算例81 81, 1221.411.81,) 81×101-81简便运算 9乘15乘81 根号81等于9 81+691×9简算 -3,9,-27,81,-243.