北师大版小学五年级上册数学计算题专项练习讲课讲稿.doc

一、口算0709=012580=824376=62580=4138=03216=14078=6416=146034=510=13856=07055=245=1003=813=3612=250004=305305=375400=07822=158=615=25004=9616=5008=325075=1001=0174=742=0168=二、列竖式计算164235=834622=2247=048350=12634=10764=95234=8136=1388629=92516=850=09911126743=2922（保留2位小数）2844814=32607=三、简便计算0.25274453664451.25320250.96259.99999.91.081258251.2516489101489331.03284530135.69560.9854