1. Which of the following is false?
2. Which of the following statements is true?
3. Which of the following statements, is false?
4. Which of the following statements, is true?
5. (+ 1) + (+ 2) = ?
6. (- 1) + ( - 2) = ?
7. (- 2) + (+ 3) = ?
8. (- 4) + (+ 3) = ?
9. (- 1) + (- 1) = ?
10. (- 1) + (+ 1 ) = ?