Fixed minor bugs.
Arithmetic for the first grade. You can learn to add and subtract easily and become familiar with numbers.
First of all, kids in school will learn how to make 10 using two numbers. Add 1 to 9 is 10, 2 to 8 is 10, 3 to 7 is 10...
The answer is always single-digit figure. Beat the Robo by answering the questions.
Have fun!
