(88+90+92+85+89+90)÷6 = =

来源：学生作业帮编辑：作业帮分类：综合作业时间：2024/11/07 23:32:12

(88+90+92+85+89+90)÷6
=[(88+92)+(90+90)+(85+89)]÷6
=(180+180+174)÷6
=180÷6+180÷6+174÷6
=30+30+29
=89

(88+90+92+85+89+90)÷6 = = （89+90+88+90+85+96+90+87+90+88+88+90+88+86+87+88+86）÷20=? 简便算法.1.9+99+999+9999 2.94=88+90+92+89+93+85+94 （90+88/1）×89/1=? (90+1/88)*1/89=? 94+88+90+92+89+93+85+94如何简便算巧算89,91,93,87,88,92,85,93,90,94的平均数 98 86 92 89 94 100 98 96 74 85 83 77 85 90 91 81 100 88从小到大排 89+91+90+92+88+87+93+92+87． 88+95+92+89+86+91+90+88+92+90+86+92+87+89+91+93+88+94+91+87 解方程 [(81+83+85+87+89)/(82+84+86+88+90)]:x=(1/25):(86/170) 100+99+98+97+96++95+94+93+92+91+90+89+88+87+86+85+84+83+82+8