This website offers many math games that allow you to practice arithmetic calculations, here is a selection of the best online math games 15 year old available.
Quiz on the calculation of the GCD (15 year old)
Quiz on vectors (15 year old)
Quiz on numerical sequences (15 year old)
Quiz on statistics (15 year old)
Sudoku game (15 year old)
Quiz on algebraic calculus (15 year old)
Quiz on calculating with square roots (15 year old)
Quiz solving equations with one unknown (15 year old)
Quiz solving inequalities with one unknown (15 year old)
Countdown game (15 year old)
Quiz on the Pythagorean theorem (15 year old)
Irreducible fraction of an expression (15 year old)