Question

[Hồ Anh]

đố vui!k dung may tinh .

1+1-2+4-5+1-9+10-1=?

Answer 1

[trịnh thúy huyền]

1+1-2+4-5+1-9+10-1=0

Answer 2

[VRCT_Hoàng Nhi_BGS]

=2-2+4-5+1-9+10-1

=0+4-5+1-9+10-1

=4-5+1-9+10-1

=-1+1-9+10-1

=0-9+10-1

=-9+10-1

=1-1

=0