Question

[Nguyễn Hữu Hưng]

1-1

2-1

3-1

kb nhe

Answer 1

[Kana]

1 - 1 = 0 .

2 - 1 = 1 .

3 - 1 = 2 .

Answer 2

[Nguyen Duc Hai A]

1-1=0

2-1=1

3-1=2