用1,2,3,4,5,6,7,8,9,10,12,13编加减乘各一道,数字不重复.
问题描述:
用1,2,3,4,5,6,7,8,9,10,12,13编加减乘各一道,数字不重复.
答
3×4=12 13-7=6 2+8=10
用1,2,3,4,5,6,7,8,9,10,12,13编加减乘各一道,数字不重复.
3×4=12 13-7=6 2+8=10