Dominoes bring a whole new dimension to math. This expanded version includes novel and interesting ways to practice addition, subtraction, problem solving, and graphing. The 71 black-line masters provide a treasure trove of unique activities under such headings as Fences, Square Sums, Domino Differences, Plots and Patterns, and Diffies. All invite the use of problem-solving skills. Helpful strategies and solutions are provided throughout.