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. State True/False : (-55) * (-22) * (-33) < 0. .

2. State True/False : (-1521) * (2511) < 0. .

3. State True/False : (2512) - (1525) < 0. .

4. State True/False : (1981) * (+2000) < 0. .

5. Find the product and check for equality : 18 * (-5) (-5) * 18 = .

6. Find the product and check for equality : 31 * (-6) (-6) * 31 = .

7. Find the product and check for equality : 4 * 51 51 * 4 = .

8. State True/False : -30÷(-6)=-6 .

9. State True/False : -64÷(-64)=0 .

10. -40÷ = 40.