9 + 9 - 18 = 9 + ( 9 - 18 ) = ( 9 - 18 ) + 9
= -9 + 9 = 0
Đúng 0
Bình luận (0)
9 + 9 - 18 = 9 + ( 9 - 18 ) = ( 9 - 18 ) + 9
= -9 + 9 = 0
9*9+25*9+31*18
9 + 9 + 10 + 11
12 + 18 + 191
18 - 9 =
18-9-2=?
18+3+9=
9 x 18 =
6/9+14/18-5/6
18+9
(1+ 9 + 18 + ... + 991 + 1000): 500 =............