脱式计算:21×5+30= 96÷6+78÷6= 11×6+55÷5= 1008÷8+120×4= 1041-(41+3

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  • 解题思路:(1)先算乘法,再算加法;

    (2)同时运算两个除法,再算加法;

    (3)(4)(6)先同时计算乘法和除法,再算加法;

    (5)根据减法的性质简算;

    (7)先同时运算两个乘法,再算减法;

    (8)先算乘法,再算加法,最后算减法;

    (9)先算小括号里面的减法,再算括号外的除法.

    (1)21×5+30,

    =105+30,

    =135;

    (2)96÷6+78÷6,

    =16+13,

    =28;

    (3)11×6+55÷5,

    =66+11,

    =77;

    (4)1008÷8+120×4,

    =126+480,

    =606;

    (5)1041-(41+328),

    =1041-41-328,

    =1000-328,

    =672;

    (6)2136÷3-48×5,

    =712-240,

    =472;

    (7)635×4-540×3,

    =2540-1620,

    =920;

    (8)32×4+76-52,

    =128+76-52,

    =204-52,

    =152;

    (9)2763÷(210-201),

    =2763÷9,

    =307.

    点评:

    本题考点: 整数四则混合运算.

    考点点评: 本题考查了简单的四则混合运算,计算时先理清楚运算顺序,根据运算顺序逐步求解即可.