(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) 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)
=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