小学一年级上册数学教学—连加连减ppt课件

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,*,连 加,连 加,5,2,1,一共有几只？,521一共有几只？,1,2,5,5,2,1,一共有几只？,+,+,=,7,8,125521一共有几只？+=78,4,3,1,4,+,3,+=,7,8,431 4+3+=78,5,9,6,10,3,6,9,10,6,59610369106,3,4,2,3,+=,7,9,3423+=79,6,3,1,6,+=,9,10,6316+=910,3+4+1=,4+3+2=,2+2+4=,5+0+3=,7+2+1=,6+4+0=,9,10,4,8,7,5,9,10,9,8,10,10,3+4+1=4+3+2=910487591,4,5,45,连 减,连 减,5,2,1,一共有,8,只。,521一共有 8 只。,2,2,原来有,8,只。,还剩几只？,8,2,2,=,6,5,22原来有 8 只。还剩几只？822=65,10,5,3,7,2,10,=,1053 7210=,8,2,4,4,8,4,=,2,82448 4 =2,10,1,3,7,10,3,=,6,1013710 3 =6,0,3,0,2,2,0,1,0,1,030220101,