Find the integers that are 4 units to the left of 0 and 2 units to the right of -3

Gap-fill exercise

  
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!
4 units to the left of 0 is
2 units to the right of -3 is