About Eighty One

If the screen is yellow and displays text, tap anywhere to close it. You can view it again by tapping on the chapter name at the top of the app.

If there is a large pulsing arrow inside a circle at the bottom of the screen, tap it to start a round.

Tap on table cells to see the corresponding math problem.

The greener the cell, the more familiar you are with this problem. If it's gold, you are the best.

If there is a math problem on the screen, tap the numbers below it to submit an answer.

If you wish to start over, tap on the chapter name and then select "Reset progress."

If you have any other questions, feel free to contact me ↓