Question

help me a second time

Answer 1

Xoá bài trước khi cj bảo mẹ:)

Answer 2

...

Lấy máy tính ra

Answer 3

0-13=-13

0-(-13)=13

Answer 4

0-13=-13

0-(-13)=13

(+13)-(+12)=+1

-13-12=-25

-13-(-12)=-1

Answer 5

0 - 13 = -13

0 - (-13) = 13

(+13) - (+12) = 1

(+13) - (-12) = 25

-13 - 12 = -25

-13 - (-12) = -1

Answer 6

0 - 13 <> -13
0 - (-13) <> 13
(+13) - (+12) <>  +1
(+13) - (-12) <> 25
-13 - 12 <> -25
-13 - (-12) <> -1