定义新运算:3△2=3+33=36,2△3=2+22+222=246,1△4=1+11+111+1111=1234。则8△6的值为()。A.886...

作者: rantiku 人气: - 评论: 0
问题 定义新运算:3△2=3+33=36,2△3=2+22+222=246,1△4=1+11+111+1111=1234。则8△6 的值为()。 A.886728 B. 986720 C.986725 D.987648
选项
答案 D
解析 依题意,8△6=8+88+888+8888+88888+888888=987648。本题可以用尾数法,个位数有6 个8,所以尾数为8,排除B、C。又因为该结果肯定大于888888,所以排除A,选择D。

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