Number work with ermine

from Oriental Works, Inc., originally released 9th September, 2011

Study with ermines♪
It's a cute math puzzle.

[How to play]
1. Create math formulas within the allotted time
- Tap ermines to choose panels.
- Press [Back] to cancel.

2. Not only one math formula!
- Unless math expressions give the same number as the answer, any formulas are [Good!!]...

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