Math: Addition and Subtraction Triads

It's easier to learn addition and subtraction if you can see the relationship from the beginning, in their groups of three. These flash cards visualize the biggest number at the top, and the two smaller numbers on the bottom. For example, 3 + 2 = 5 will show the 5 at the top, and 3 and 2 at the bottom. By visualizing only three numbers, you can intuit all four combinations: 3 + 2 = 5, 2 + 3 = 5, 5 - 3 = 2, 5 - 2 = 3.