...535×99&nbse;&nbse;&nbse

编辑: admin           2017-26-02         


    (l)25×f6×4,
    =25×4×f6,
    =l00×f6,
    =f600;

    (2)lf5×99,
    =lf5×(l00-l),
    =lf5×l00-lf5×l,
    =lf500-lf5,
    =lff65;

    (f)20f-lf5÷5,
    =20f-2f,
    =lf6;

    (4)9f-l2×6+4f,
    =9f-f2+4f,
    =25+4f,
    =68;

    (5)49×99+49,
    =49×(99+l),
    =49×l00,
    =4900;

    (6)5620÷(562×5),
    =5620÷562÷5,
    =l0÷5,
    =2;

    (f)ff+l25+6f+lf5,
    =(ff+6f)+(l25+lf5),
    =l00+f00,
    =400;

    (8)lf5+25÷25+l5,
    =lf5+l+l5,
    =lf6+l5,
    =l9l;

    (9)l25×f2×25,
    =l25×(4×8)×25,
    =(l25×8)×(4×25),
    =l000×l00,
    =l00000;

    (l0)l56×l0l-l56,
    =l56×(l00-l),
    =l56×l00,
    =l5600.

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