It is a "time calculation" iterative problem collection for elementary school second grader.
Let's improve academic ability by doing iterative calculation.
It is a format that selects answer to the problem from 4 options.
The question is randomly presented.
We will be asked 20 questions in a row continuously.
Example problem
What is 2 hours?
What is 1 hour 20 minutes?
What time is 90 minutes?
Supported OS
Android 4.0 or higher