Number Ladder

? How to play

There is an empty staircase and below, several cards with mixed operations.

1. Calculate mentally the result of each operation on the tray.
2. Touch the card that you think goes first according to the requested order (smallest to largest or largest to smallest): it will place itself in the next empty step.
3. You can also drag a card directly to a specific step.
4. Touch a step that is already filled to return that card to the tray.
5. When all the steps are filled, press Check.