A math game where users solve addition, subtraction, multiplication, and division problems within a 20-second time limit. Select symbols to input answers in a hatena box. Compete with friends for correct answers and track progress.
Practice subtraction with three difficulty levels.
The app offers subtraction practice with three difficulty levels: easy, medium, and hard. Users can select the difficulty and the number of problems in the settings screen.
This app explains the rules for solving pre-algebra problems. It was made by a former math professor to help users understand how to solve any pre-algebra problem.