Collaborative Learning Project
Four in a Row Addition and Subtraction
Scroll down to find four fun addition and subtraction partner game boards, complete with endless opportunities for practice with numbers 0-38. Kids choose numbers from a number box and, depending on the game, either find the sum or the...
University of Cambridge
University of Cambridge: Nrich: Super Value Codes
On this one page website sharpen your logic and addition skills while working on this challenge. The solution is available to double check your solution.