Category | Price | Seller | Device |
---|---|---|---|
Education | Free | Andrew Gilham | iPhone, iPad, iPod |
You can customise the difficulty by setting the smallest and largest numbers added or multiplied together.
The free version allows sums of up to 7+7 or 7x7. The full version, available as an in-app purchase, extends this limit to 20x20 - giving you a great mental arithmetic workout!