Fill in the blanks to make the following statements true:
- (-5) + (-8) = (+8) + (……)
- -53 + …… = -53.
- 17 + …… = 0
- [13 + (-12)] + (…… ) = 13 + [(-12) + (- 7)]
- (- 4) + [15 + (- 3)] = [(-4) + 15] + …….
Fill in the blanks to make the following statements true: