2,4,6,8,10,,,,18 19,17,15,13,,2+1=3+0 10-4=6+0 10= + = - =20-_数学解答

2,4,6,8,10,,,,18 19,17,15,13,,2+1=3+0 10-4=6+0 10= + = - =20-

人气：178 ℃　时间：2020-06-22 22:57:18

解答

题1：
2,4,6,8,10,12,14,16,18
题2：
19,17,15,13,11,9,……
题3：
2+1 = 3+0
10-4 = 6+0
10 = 10+0 = 10-0 = 20 - 10