Math operations Adding three numbers Adding three numbers: Practice adding three numbers. Level game: 2nd, 3rd and 4th grade Math games recommended for You: Counting with money 2nd grade3rd grade4th grade Share this Practice math games: Order of operations (difficult) Centimeters to kilometers Greater than and less than sign (to 50) Leave A Comment Cancel reply Save my name, email, and website in this browser for the next time I comment.