Borad of Numbers

4 kind
- 1 to 100 : 10 x 10
- 1 to 121 : 11 x 11
- 1 to 225 : 15 x 15
- 1 to 361 : 19 x 19

simple calculator
- touch a number on the board
- touch calulate symbol ( +, - , x, % )
- touch a number on the board
- touch equals button
then see result
- touch clear button