=38>
=30X50+8>
=1500+400

        =1900

        哪怕38x24+12x24+24,算法也变成:

        =(38+12)x24+24

        =50x24+24

        =1200+24

        =1224

        又或者:18×24+36×38

        =18×24+18×76

        =18×(24+76)

        =18×100

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