The Addition & Subtraction War Flash Cards for ages 5+ make practicing math facts within 10 exciting and fun by turning equations into the card game war. This set features half addition and half subtraction problems, each represented by different color cards for easy recognition. The Brighter Child® Flash Cards are a series of flash cards that offer kids from kindergarten to fifth grade reinforcement for important skills. Each set can be used as review cards or for creative fun games that allow your child to play and learn. Each set includes 54 flash cards, often with bonus cards that offer games, extra help, or additional learning fun.