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? asked in 教育及參考書教學 · 9 years ago



1 Answer

  • Anonymous
    9 years ago
    Favorite Answer

    Example 1:

    Amy has 2 boxes, Peter has 5 more boxes than Amy, How many boxes does Peter has?

    Then you can write

    Peter has:



    Therefore, Peter has 7 boxes.

    Example 2:

    There are 20 sweet in box A, and there are 40 sweet in both box A and B

    How much sweet in box B?

    Let box B has x sweet

    x+20 = 40

    x = 20

    Box B has 20 sweet.

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