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水水☆星星 在一道減法算式里,被減數、減數與差的和是100,其中減數時38,被減數是(50 ),差是(12). 解析: 被減數=減數+差 題目中告訴我們:被減數、減數與差的和是100 即2個被減數的和是100,那麼被減數=100÷2=50 而題中告訴我們:減數=38 所以差:50-38=12
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