(5/16+7/8)X16(简便) 1/14X(28-14/15(简便) 4/7X9-4/5X2 都用算式(不简算)

日期:2012-07-10 22:07:40 人气:2

(5/16+7/8)X16(简便) 1/14X(28-14/15(简便) 4/7X9-4/5X2 都用算式(不简算)

(5/16+7/8)X16(简便) =5/16×16+7/8×16 =5+14 =19 1/14X(28-14/15)(简便) =1/14×28-1/14×14/15 =2-1/15 =1又14/15 4/7X9-4/5X2 =36/7-8/5 =124/35
    A+
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