Calculator & abacus training

This app is calculation drill for calculation training.
You can training that Abacus(soroban) & calculator & math

·Training mode
You can create the training that fits your level.
Purchase before you can create two. After the purchase will be able to create six.
Training time is pre-purchase is 50 times, after the purchase will be saved 200 times,
You can see their growth condition.
Training can be set in the range of below.
Kind: addition, the addition subtraction MIX, multiplication, division
Number of digits: up to 5 digits (9-digits after purchase)
Number of lines: up to 5 lines (15-digits after purchase)
Number of Questions: up to 50 questions

・Challenge mode
Level goes up and to clear the problem within the 100 s.
Since the problem is more and more difficult, let's challenge to your limits.