67,54,46,35,29() A.13 B.15 C.18 D.20
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/08 15:00:59
67,54,46,35,29() A.13 B.15 C.18 D.20
67,54,46,35,29() A.13 B.15 C.18 D.20
67,54,46,35,29() A.13 B.15 C.18 D.20
c.18
十位是6,5,4,3,2,1
个位与十位的差值两两相同:7-6=1,5-4=1;6-4=2,5-3=2;9-2=7,8-1=7