— The Standard Order of Operations applies

— Click Correct or press the Up Arrow key if you think the equality is correct

— Click Incorrect or press the Down Arrow key if you think the equality is incorrect

— If your answer is incorrect, the equality will turn red

— If your answer is correct, the equality will turn green

— The next equality will be generated automatically

— Use the Easy, Medium, and Hard buttons to control difficulty

— The bar shows the ratio of correct to incorrect answers