This teaching resource, compatible with iPad and Android tablets, provides a chance to practise completing additions where one of the numbers to add is missing. Drag the tiles on the right to fill in the blank space. A correct answer results in the addition disappearing. An incorrect answer leaves the addition there but also adds another to the top. Children can be challenged to get the best time.
The resources does not end the game when the lines reach the top and this is intentional as it allows teachers and children to ignore the challenge element of they want to and just practise or demonstrate using the resource.
The timer starts the moment the first tile is released and can be reset using the reset button at anytime.