笔算加法(不连续进位),验算,4,同学们制作了一批树叶粘贴画,选出142幅放进橱窗展览,还剩86幅。,一共制作了多少幅?,14286(),4,14286(),你能用竖式计算吗?先算一算,再和同学交流。,142,+86,8,2,百十个,2,要知道算得对不对,可以怎样做?,86,+142,8,2,2,答:一共制作了幅。,228,228,幅,用竖式计算643752,并验算。,643,+752,5,9,3,1,752,+643,5,9,3,1,验算:,1.,57,+435,2,9,4,621,+848,9,6,4,1,230,+96,6,2,3,2.,313605,87252,943154,605313,25287,154943,87,+252,9,3,3,943,+154,7,9,0,1,313,+605,8,1,9,252,+87,9,3,3,154,+943,7,9,0,1,605,+313,8,1,9,3.用竖式计算,并验算。,542405,74794,30328,895602,=947,=868,=331,=1497,303,+28,1,