math
i use this for students who can solve this so whoever joins in they need to do this hard question only 1% of people can do this
問題一覧
1
6666-1000
5666
2
10+10+10+10+10+10+10+10+10+10
100
3
1+1+1+1+1+1+1+1
8
4
700+100
800
5
x+y
xy
6
1234+1234
1468
7
78+1
79