从1,2,3,4,5,6,7,8,9这9个数学中,挑出4个数学,组成2个两位数,使它们的和是100

2024-11-29 22:39:20
推荐回答(2个)
回答1:

17和83,16和84,14和86,13和87,21和79,24和76,26和74,29和71,31和69,32和68……

回答2:

21 79
24 76
31 69
32 68
41 59
42 58
43 57