Use all four twos, and the operations available from the buttons below, to construct various
mathematical expressions. Click a button to add an operator tile, and then build up expressions by
dragging the tiles on top of each other in the shaded area —
the borders will turn red when combination is possible. (You can also drag two numbers together to
- Can you construct expressions that
evaluate to each number from 1 to 10?
(Don't try too hard to get 7 — it's impossible!)
- What other interesting values can you make?
- How big do you think the largest possible value might be? See if you can make it.
to store a copy of any complete expression in the box on the right.