おかねのけいさん

This is an app that allows you to practice paying the amount displayed on the screen.
The screen displays 1000 yen banknotes, 500 yen coins, 100 yen coins, 50 yen coins, 10 yen coins, and 1 yen coins. Drag it to the green area.
In basic mode, if you pay more, change will be displayed.
In difficult mode, if you pay correctly, a 〇 will appear.
? ? ? Press the key and the amount paid will be displayed.
The amount increases each time you pay. Also, if you return it, the amount will decrease.
By studying, you can learn about denominations and ranks.