This website offers many math games that allow you to practice arithmetic calculations, here is a selection of the best online math games 1st 2nd 3rd Grade available.
Subtraction tables game (1st 2nd 3rd Grade)
Multiplication game (1st 2nd 3rd Grade)
Sudoku game (1st 2nd 3rd Grade)
Magic square game (1st 2nd 3rd Grade)
Countdown game (1st 2nd 3rd Grade)
Three operations game (1st 2nd 3rd Grade)
Times tables game (1st 2nd 3rd Grade)
Addition tables game (1st 2nd 3rd Grade)