Addition flash cards for ages 6 and up, featuring problems through 12, with a self-checking design.
A box of "Addition 0-12" flash cards by Trend, featuring a red box with white cards displaying addition problems like "12 + 8 = 20," a yellow storage box, and three sample flash cards showing problems such as "8 + 7 = 15" and "3 + 3 = 6."