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三位数除以一位数的笔算,西师大版三年级数学下册,学习目标,1.,同学们在探索研究的过程中进一步掌握除数是一位数的除法计算方法,会计算三位数除以一位数的笔算除法。,2.,提高同学们的计算能力,培养知识类推能力和抽象概括能力。,三位数除以一位数的笔算,400,4=3208=,1206=242=,3609=4808=,8008=6006=,100,20,40,100,40,12,60,100,一、口算,6,4,4,9,7 2,0,二、笔算,1,2,4,2,0,小汽车平均每时行多少千米?,例,234,2=,1,2,2,3,0,1,14,1,7,117(km),答:小汽车平均每时行,117,千米。,4,1.,先说出商是几位数,再计算。,276,2=,488,4=,1,2,6,7,0,1,16,3,8,1,4,8,8,0,8,8,2,2,138,122,6,欢迎来到野生动物世界,2.,一只老虎一次要吃,2030kg,肉,相当于,8,只鸡,如果有,120,只鸡,够一只老虎吃几次呢?,120,8,=,1,5,(,次,),答:够一只老虎吃,15,次。,8,40,4,0,1,5,0,3.,先说出商是几位数,再计算。,1,4,2,0,8,6,2,1,5,5,7,0,2,1,5,24,8,25,4,5,4.,先找出错在哪里,再改正。,4,5,3,0,9,7,35,3,6,1,2,3,1,6,0,6,4,0,2,5,3,2,3,4,0,6,2,9,7,5,3,536,4=,186,6,=,428,2,=,230,2=,783,9=,984,8=,427,7,=,500,4,=,134,2,14,87,61,31,115,123,125,5.,比一比,看谁算得又对又快。,
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