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小学数学人教版一年级下册整十数加、减整十数课堂教学课件ppt
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这是一份小学数学人教版一年级下册整十数加、减整十数课堂教学课件ppt
整十数加、减整十数2 + 3 =5 + 4 =3 + 4 =6 – 2 =7 – 4 =9 - 4 =597435算一算例题 发书了！10 + 20 =30 - 20 =30 - 10 =例题10 + 20 =30例题10 + 20 =例题10 + 20 =例题10 + 20 =30例题30 - 20 =10例题30 - 20 =10例题30 - 20 =10例题30 - 20 =10例题30 - 20 =10例题30 - 20 = 1030 - 10 = 例题30 - 20 = 1030 - 10 = 20例题10 + 20 =30 - 20 =30 - 10 =301020例题10 + 20 =30 - 20 =30 - 10 =301020例题40 + 20 =60 - 20 =60 - 40 =604020做一做算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =5502209904403 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算20 + 30 =50 - 20 =50 + 30 =80 - 30 =30 + 40 =70 - 40 =80 + 10 =90 - 80 =5030703080509010算一算练一练40 + 30 =60 - 50 =80 - 80 =95 - 5 =700109090 - 40 =509 + 30 =3970 + 7 =7720 + 20 =4050元10元30元（1）买上面三样物品一共需要多少钱？50 + 10 + 30 = 90（元）练一练（2）付给售货员100元，应找回多少钱？100 - 90 = 10（元）50元10元30元练一练（3）帽子比围巾贵多少钱？50 - 30 = 20（元）50元10元30元练一练练一练10 20 30 40 501070702050304010 20 30 40 5010707030402050练一练课堂小结再 见
整十数加、减整十数2 + 3 =5 + 4 =3 + 4 =6 – 2 =7 – 4 =9 - 4 =597435算一算例题 发书了！10 + 20 =30 - 20 =30 - 10 =例题10 + 20 =30例题10 + 20 =例题10 + 20 =例题10 + 20 =30例题30 - 20 =10例题30 - 20 =10例题30 - 20 =10例题30 - 20 =10例题30 - 20 =10例题30 - 20 = 1030 - 10 = 例题30 - 20 = 1030 - 10 = 20例题10 + 20 =30 - 20 =30 - 10 =301020例题10 + 20 =30 - 20 =30 - 10 =301020例题40 + 20 =60 - 20 =60 - 40 =604020做一做算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =5502209904403 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算3 + 2 =30 + 20 =6 - 4 =60 –40 =4 + 5 =40 + 50 =7 - 3 =70 –30 =550220990440算一算20 + 30 =50 - 20 =50 + 30 =80 - 30 =30 + 40 =70 - 40 =80 + 10 =90 - 80 =5030703080509010算一算练一练40 + 30 =60 - 50 =80 - 80 =95 - 5 =700109090 - 40 =509 + 30 =3970 + 7 =7720 + 20 =4050元10元30元（1）买上面三样物品一共需要多少钱？50 + 10 + 30 = 90（元）练一练（2）付给售货员100元，应找回多少钱？100 - 90 = 10（元）50元10元30元练一练（3）帽子比围巾贵多少钱？50 - 30 = 20（元）50元10元30元练一练练一练10 20 30 40 501070702050304010 20 30 40 5010707030402050练一练课堂小结再 见
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