上海市九年义务教育课本数学一年级第二学期试用本市公开课获奖课件省名师优质课赛课一等奖课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,本资料仅供参考，不能作为科学依据。谢谢。本资料仅供参考，不能作为科学依据。本资料仅供参考，不能作为科学依据。谢谢。本资料仅供参考，不能作为科学依据。,上海市九年义务教育书本数学一年级第二学期（试用本）,交换,1/15,一共有几枝郁金香？,2/15,61,61,61,61,71,71,71,71,哪一道题轻易?,59+2=,58+3=,或,2+59=,6+65=,5+66=,或,3+58=,或,65+6 =,或,66+5 =,3/15,用你以为轻易方法来计算。,37+2=,3+37=,37+4=,5+37=,37+6=,39,40,41,42,43,37,37,37,37,37,+,+,+,+,+,2,3,4,5,6,=,=,=,=,=,39,40,41,42,43,4/15,6712,6713,6714,6715,1567,6716,1667,79,80,81,82,83,298,算完后，你发觉了什么？,476,565,100,387,90,80,70,654,60,873,1367,546,6717,1767,5/15,想一想,算一算!发觉了什么?,24+16=,22+18=,20+20=,18+22=,16+24=,40,40,40,40,40,6/15,24+16=,40,22+18=,40,20+20=,40,18+22=,40,16+24=,40,34+50=29+41=33+61=,38+46=32+38=40+54=,42+42=35+35=47+47=,46+38=38+32=54+40=,50+34=41+29=61+33=,84,84,84,84,84,70,70,70,70,70,94,94,94,94,94,想一想,算一算!发觉了什么?,7/15,9+4=,4+19=,19+14=,14+9=,7+6=,27+26=,8+35=,38+35=,7+46=,78+15=,57+36=,8+5=,13,53,93,53,13,23,33,23,13,73,43,93,推算,8/15,小竞赛,3+3=8+8=5+6=3+4=,13+13=18+18=16+15=13+4=,23+23=28+28=15+26=14+13=,33+33=28+38=26+25=23+14=,43+33=38+38=35+36=24+23=,6,26,46,66,76,16,36,56,66,76,11,31,41,51,71,7,17,37,27,47,9/15,收获,10/15,游戏：跷跷板,11/15,29+67,67+32,14/15,27+39+84 84+27+39,=,15/15,