It is a collection of ninety-nine hole-filling iterative problems for elementary school second grader.
Rather than buying a drill, rather than buying a collection of questions,
Repeat practice with free apps! Calculation is determined by the amount of iteration!
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.
■ Problem example · () × 5 = 25
· 7 × () = 63
Supported OS
Android 4.0 or higher
