小学二年级上册数学第六单元8的乘法口诀PPT课件.ppt
口答3×6 = 6×5 = 7×2 = 1×7 = 7×6 = 2×5 = 7×7 = 4×7 = 6×3 = 5×4 = 7×5 = 6×4 =,18,7,49,20,30,42,28,35,14,10,18,24,8,16,24,32,40,48,56,64,8的乘法口诀,16,24,32,40,48,56,64,十六,二十四,三十二,四十,四十八,五十六,六十四,更多全套课件免费下载:绿色圃中小学教育网http:/www.lspjy.com,二八( ) ( )八四十八五八() 八( )六十四 四()三十二 ( )八二十四,十六,四十,八,六,八,三,32,32,32,48,48,48,56,56,56,8,8,1只螃蟹有几条腿?,2只螃蟹几条腿呢?,3只呢?,4只呢?,5只呢?,6只呢?,7只呢?,8只呢?,2×8=16,×(个),×(棵),看卡片口算,并说说分别用哪句口诀计算的!85 = 84= 82 = 87= 81 = 83= 88 = 86=,40,16,8,64,32,56,24,48,填适当的数7 ( )=56 8 ( )=328 ( )=40 ( )( )=24,8,5,4,8,1,2,3,4,5,6,7,8,你能用口诀算一算吗?,56,12,32,24,64,16,48,21,42,40,24,4 6 2 66 8 8 8,7 6 7 85 8 5 4,8 4 3 82 8 3 7,游戏:摘苹果,20,开火车口答:,8×3=5×8=4×8=8×2=8×6=3×8=8×8=,24,40,32,16,48,24,64,8×2=6×7=5×8=5×6=7×3=4×8=8×3=,16,42,40,30,21,32,24,8×6=5×7=8×8=6×8=2×8=5×6=4×7=,48,35,64,48,16,30,28,