Number System

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

1. (-5) - (-8) = .

2. (-100) - 0 + 100 = .

3. -44 + = -88.

4. - 75 = -45.

5. - (+50) = -80.

6. State True/False : (-675) - (-400) = -1075.

7.State True/False : 15 - (-18) = 15 + 18.

8. State True/False : (-45) - (-8) = (-8) - (-45).

9. - (-5) = 1.

10. 12 - = 19.

11. (-7) - (-15) = .

12. -200 - (+100) = .

13. 35 - (-64) = .