Three sets of flash cards to build, reinforce and retain basic math skills.

1. Subtraction 0-12: Facts through 12. Self-checking design (91 cards)
2. Subtraction 13-18: Facts 13-18. Self-checking design (99 cards)
3. Triangle Math flashcards (multiplication/division): All facts 0-12. Teaches the relationship between multiplication and division. Six teaching methods with graphic aids for each fact. Tabs for sorting cards. (94 cards)

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