Yes. Please follow the steps described below to move exercises from one assignment into other:

  1. Click on the ellipsis (three side by side dots) at the far left of the exercise you like to move
  2. Select "Move" from the list
  3. Select the assignment you like to move the exercise to and then hit "OK"
  4. Reorder the exercises in both of the assignments by clicking on the "Batch Rename" and hitting "OK" on the popup window