promotion image of download ymail app
徐老媽 發問時間: 社會與文化語言 · 8 年前


美式數學教法有1.facts family 2.releated facts..有人可以告訴我這二種是什麼嗎?同時也請example.....3Q

1 個解答

  • 8 年前

    A fact family is a group of related facts using the same number

    For example: by using numbers 3, 7, 11

    Fact family:

    3+7=11, 7+3=11, 11-3=7, 11-7=3

    The above are 4 related facts in the fact family for number 3, 7, 11 for the addition and subtraction facts

    Now, let see the fact family for number 3, 8, 24 for the multiplication and division facts

    3x8=24, 8x3=24, 24/3=8, 24/8=3

    Pay attention to each related fact has 3 same numbers.

    By using the related facts (addition, subtraction, multiplication, division) to find the missing factor (number). The concept is very simple, but it gives students different kind of thinking (by grouping and relating) in solving the problem.

    If you want to read more about this, please refer to the following sites:

    參考資料: self
    • Commenter avatar登入以對解答發表意見