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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,#,100,以内数的加法(不进位),绿色行动,100,以内的加减法(一),口答:,3,个十是( )。,3,个 一是( )。,8,个十和,4,个一合起来是( )。,4 5,里面有( )个十和( )个一。,30,3,84,4,5,口算:,60+2=,60+20=,62,80,34,70,30+4=,30+40=,亮亮和东东一共浇了多少棵花?,亮亮和芳芳一共浇了多少棵花?,亮亮和东东一共浇了多少棵花?,26 + 3 = (,棵),29,合起来是,2,个十和,9,个一,就是,29.,先摆,2,个十和,6,个一,再摆,3,个一,,用计数器,十,个,百,26,+3,亮亮和东东一共浇了多少棵花?,26+3=,29,(棵),6+3=9,20+9=29,亮亮和芳芳一共浇了多少棵花?,26 + 30 = (,棵),56,合起来是,5,个十和,6,个一,就是,56.,先摆,2,个十和,6,个一,再摆,3,个十,,用计数器,十,个,百,26,+30,亮亮和芳芳一共浇了多少棵花?,26+30=,56,(棵),20+30=50,50+6=56,26+3=,26+30=,比较:,3,是一位数,,30,是两位数,也叫整十数。,相同数位上的数相加,计算时要注意计算的单位,,个位上的数要加在 位上。,整十数要加在 位上。,个,十,智慧城堡,加油啊!,41+50=,41+5 =,91,93,87,46,57,69,53+40=,20+67=,53+4 =,2+67 =,2.,试一试:,40,个,34,个,苹果和梨一共有多少个,?,=,40,+,34,74,96,77,67,63,它们该坐哪个车厢,连一连。,43+20,64+3,56+40,73+4,52+3,55,43+20,72+6,23+4,33+3,54+20,63,78,74,27,36,找新家:,口算:,30+5= 5+20= 70+3= 9+40=30+50=50+20=70+30= 50+50=,35,25,73,49,80,70,100,100,先口算,再给算式分分类,30+6 =,5+20 =,60+4 =,60+40=,50+50=,9+40 =,50+20=,30+60=,36,90,25,70,64,100,49,100,口答:,35,=,30+,( ),57,=,7+,( ),65,=,60+,( ),29,=,9+,( ),5,20,5,50,35+3 =,一包数学书是,35,本,桌子上还有,3,本,数学 书一共有多少本?,答:数学书一共有,38,本,。,38,(,本,),先算个位上的,5+3=8,,再算,30+8=38,两位数加一位数,一包数学书和一包语文书一共是多少本?,35+30 =,65,(,本,),答:一包数学书和一包语文书一共有,65,本,。,先算,30+30=60,,再算,60+5=65,两位数加整十数,计算时要注意计算的单位,,个位上的数要加在 位上。,整十数要加在 位上。,个,十,1.,53 + 4 =,62 + 7 =,5 + 31 =,86 + 2 =,4 + 72 =,44 + 3 =,57,69,36,88,76,47,2.,53 + 20 =,50 + 31 =,72 + 20 =,64 + 30 =,20 + 67 =,45 + 30 =,73,81,92,94,87,75,3.,我们班有,20,个女生。,有,23,个男生。,一共有多少个学生,?,20 + 23 = 43,(,个,),答,:,一共有,43,个学生。,20,25,76,+,3,23,28,79,2,20,69,+,30,32,50,99,4.,21+3=,3+21=,46+2=,2+46=,24,24,48,48,说说你是怎么算的,27+40=,40+27=,10+58=,58+10=,67,67,68,68,42+20=,62,5+24=,29,57+2=,59,35+23=,58,41+32=,73,找到答案和我一样的小动物去我家做客!,4+72,76,20+56,46+3,65+1,5+21,(76),(49),(76),(66),(26),按得数从大到小排队,40+12,17+72,24+32,4+72,40+30,(52),(70),(89),(56),(76),+,=,7,-,12,=,10,=,( ),=,( ),10+12=22,22,22,29,29,选择=结果,汇报结束,谢谢观看,!,欢迎提出您的宝贵意见!,
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