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    精英家教网 > 小学数学 > 题目详情
    2
    5
    +
    2
    5
    +
    2
    5
    +-----------+
    2
    5
    +
    2
    5
    100个
    =
    2
    5
    2
    5
    ×
    100
    100
    =
    40
    40
    ．
    分析：有100个
    2
    5
    相加，根据乘法的意义直接求解．
    解答：解：
    2
    5
    +
    2
    5
    +
    2
    5
    +-----------+
    2
    5
    +
    2
    5
    100个
    =
    2
    5
    ×100=40．
    故答案为：
    2
    5
    ，100，40．
    点评：本题考查了乘法的意义：乘法是求出几个相同加数和的简便运算．
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