Question

1+1-1

Answer 1

Ban nao tra loi thi ket ban zoi mik nha.

Mik k cho !!!

Answer 2

1+1-1

=2-1

=1

Answer 3

1 + 1 - 1
= ( 1 + 1 ) - 1
= 2 - 1
= 1

Answer 4

1+1-1

2-1

1

Answer 5

1+1-1

1+1-1

=2-1

=1

Answer 6

  1 + 1 - 1

=    2   - 1

=       1

k nha

Answer 7

1 + 1 - 1

= 1 x 2 - 1

= 2 - 1

= 1

nha bn