| 单词 | fact family |
| 释义 | fact familyˈfact ˌfamily noun [countable] math a set of four addition and subtraction calculations, or a set of four multiplication and division calculations, which use the same three numbers. For example, a fact family for 2, 3 and 6 is: 2 × 3 = 6, 3 × 2 = 6, 6 ÷ 2 = 3 and 6 ÷ 3 = 2. |
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