A '''fact family''' is a group of arithmetic facts which use the same numbers. For example, 7 - 3 = 4 and 7 - 4 = 3 and 3 + 4 = 7 and 4 + 3 = 7. Students in primary school are told to memorize these related facts together. | A '''fact family''' is a group of arithmetic facts which use the same numbers. For example, 7 - 3 = 4 and 7 - 4 = 3 and 3 + 4 = 7 and 4 + 3 = 7. Students in primary school are told to memorize these related facts together. |