![[Small 1 Arithmetic subtraction 1 digit] Easy! Repetitive problem collection (free)](data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=)
It is a one-digit subtraction iterative problem collection for elementary school first grade.
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.
Supported OS
Android 4.0 or higher
