《小学数学三年级 口算乘法(公开课) 1 维语ppt课件.ppt》由会员分享,可在线阅读,更多相关《小学数学三年级 口算乘法(公开课) 1 维语ppt课件.ppt(17页珍藏版)》请在三一办公上搜索。
, !,2 ,5 10 ,10 10 , :10+10=20(), :102=20(), , - ., ,10 , 2 9 ,2918( ), 2 10 ,21020( ), 210, 3 20 ,20360(),200,2000, ,204,20004,2004,80,800,8000, ., ,0,0,00,00,000,000,205,20005,2005,100,1000,10000,0,0,00,00,000,000, , , .,104,106,108,204,406,608,3004,5006,7008,40,60,80,80,240,480,1200,3000,5600,:,220,40(), .20 , 90 4 ,360, 20 ,40,60,80,100,120, , ,30350032003604,403350020026004,=, !,207,20007,2007,140,1400,14000, ., ,0,0,00,00,000,000, :,(1) 69- 1-(2) 25-1-(3) 25-12-,