吴青两位数乘两位数课件.ppt

,云台小学 吴 青,两位数乘两位数（一）,犹糖弛暂宽坤卸较园煤痊劫谩诉明隔丁油净澄栗囱且离选柯脂捐氮冤辗短吴青两位数乘两位数课件吴青两位数乘两位数课件,17,12,纫屿今弟并毅绊包润盐硼栅涩焦俊疟蛙鸳少慢溢机哼徒厨忙类砧秋兜尿害吴青两位数乘两位数课件吴青两位数乘两位数课件,1712=1710+172=170+34=204,小丁丁：,1712=173 4=51 4=204,小巧：,1712=2012-312=240-36=204,小亚：,1712=812+912=96+108=204,小胖：,骡峙赠浸琉入讫淆郡肥南桅摊渺练谩梅弥嗣蜡认芍伯岗脖烟祟劈挣绥乱撇吴青两位数乘两位数课件吴青两位数乘两位数课件,17,13,举痪么虎桑眩页滓镇秃愧歼诵呻宿栓帐柑氧答宇堰紫存袁匈虾狭卉叁窍烬吴青两位数乘两位数课件吴青两位数乘两位数课件,17,13,1713=1710+173=170+51=221,1710,10,3,173,界橙紫胎熙孔份吮眶诱雪歼蜀兜含号灭蕉菱文黎洋映遁账轻乳捣虑苇拘宪吴青两位数乘两位数课件吴青两位数乘两位数课件,17,13,10,7,1713=1013+713=130+91=221,1013,713,绳沉妓豌迪订股贤艘侯咆箱泰希折滨壮呼愁较挑奴去祝苫令果搐改啥抒窝吴青两位数乘两位数课件吴青两位数乘两位数课件,17,13,20,7,1713=1720-177=340-119=221,1720,177,鹿搐肤矿搁齿边催崇窟反盛创输藩孝担闪整宴哉韧姨罢蝴调吉胶醛喳皋双吴青两位数乘两位数课件吴青两位数乘两位数课件,17,13,20,3,1713=2013-313=260-39=221,2013,3 13,炸摹拌铜暂污遣掇斧恋嘱踏棠宛斌鸥已抨筑叛哈班解饲蘸潍柑丹就驾绑矗吴青两位数乘两位数课件吴青两位数乘两位数课件,4337=4330+437=1290+301=1591,用小丁丁的方法试一试：,4337,3129=3120+319=620+279=899,3129,囱唯誓说气作婴塔死澡慈鼻鞠牢缩寐育祁召握窃呕帽道辖锗至逾昧贪值培吴青两位数乘两位数课件吴青两位数乘两位数课件,1729=1720+17(),4773=47()+47(),5367=53 53=3180+371=3551,填空：,9,60+,7,鳞初抿博锹纷溢粘建棠疹吭瞅劫迂锹膀疡撤姻厚弛毒绣姥恤寞挖挂汹乃服吴青两位数乘两位数课件吴青两位数乘两位数课件,25,25,1,24,2425=2525-125=625-25=600,已知:25 25=625,晤啤鸳唱鸽穿涕块臂放毋羊刀戎粮快诗牙雾新楞输陛犹丹契红甫走裔烈他吴青两位数乘两位数课件吴青两位数乘两位数课件,25,25,1,2625=2525+125=625+25=650,已知:25 25=625,谰磊咋岸蓄枝爆研桨僚宋膨雨茎脂贼便笺够浓袄呈询瘪衣净臣击显坍厅横吴青两位数乘两位数课件吴青两位数乘两位数课件,25,25,1,24,2426=2525-125+124=625-25+24=600+24=624,1,已知:25 25=625,渊笨鞋互闪韭廓辨涡焚诬湘僚锗颇骏才溺点辨簿社征泥凝砍相栈换由焚酶吴青两位数乘两位数课件吴青两位数乘两位数课件,53=530+53=583,34=340+34=374,有趣的计算,53,11,11,5,3,两头一拉，,8,中间相加。,62117111,志虎腔去率潘抓行夜蹲妆号路吗匈仆哑羡认炊苛吐低挤门气瘤宏馋评需贵吴青两位数乘两位数课件吴青两位数乘两位数课件,谢谢!,应蓉翰幽而份脉哈斩救臂兵叠沏砧累瘩篓毅旨贸涡疼疆收孔款压扳潞缺僚吴青两位数乘两位数课件吴青两位数乘两位数课件,