This set includes Number Sentences on individual cards, to be matched with other Number Sentences in the same Fact Family. Answers up to 10 are included. A set of four Fact Family Cards is color coded with 4 separate colors (for self-checking). Cards are green, pink, blue, and purple. Double Facts are also included, with answers up to 22. This is great for matching addition and subtraction facts to reinforce turn-around facts and addition and subtraction skills.