An easy fun way for kids to practice essential math skills. This 54-card set includes 52 self-checking flash cards that feature more than 100 subtraction problems. Two bonus resource cards are also included with additional tips and math game ideas. Large, bold numbers are placed on a white background for easy reading. Flash cards allow kids to develop critical thinking, decision-making, turn-taking and other skills while allowing them to learn in a hands-on way. Width: 3.25"; Height: 5.25"; Color(s): Assorted; Age Recommendation: Ages 6 and Up.