5、4、3、2加几.ppt

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,*,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,*,5,、,4,、,3,、,2,加几,9,+,5=,9,+,4=,9,+,3=,9,+,2=,8,+,5=,8,+,4=,14,13,12,11,13,12,8,+,3=,7,+,5=,11,12,复习,9,+,8,=,17,1,7,10,第一关,8,+,7,=,15,2,5,10,第二关,7,+,5,=,12,3,2,10,第三关,6,+,5,=,11,4,1,10,第四关,5 +7=,2,3,10,12,5 +7=,5,2,10,12,装,扮,圣,诞,树,交换加数的位置，和不变。,5+7=,小数加大数，一般是看成大数加小数进行计算。,12,5+8=,13,7,+,5,=,3,2,10,12,3,8,+,5,=,2,3,10,13,装,扮,圣,诞,树,5,+,7,=,5,+,8,=,想一想,7,+,5,=,8,+,5,=,12,12,13,13,4,+,8,=,3,+,9,=,想一想,8,+,4,=,9,+,3,=,12,12,12,12,看图列算式：,+,=,5,6,11,+,=,6,5,11,+,=,4,7,11,+,=,7,4,11,看图列算式：,5+7,7+5,4+9,9+4,5+9,9+5,3+8,8+3,12,12,13,13,14,14,11,11,请你先观察上下两道题有什么规律，再算一算。,9+2=,先说得数,再写算式。,1,、,7+,7,=14,5+,7,=12,3+,7,=10,6+,7,=13,4+,7,=11,+7,7,4,6,5,3,先说得数,再写算式。,1,、,+9,5,4,3,2,2+,9,=11,3+,9,=12,5+,9,=14,4+,9,=13,先说得数,再写算式。,1,、,5,4,3,+8,3+,8,=11,5+,8,=13,4+,8,=12,看谁算得又对又快。,2,、,5,+,7=,13,-,3=,2,+,9=,10,-,7=,5,+,9=,3,+,8=,4,+,8=,10,-,9=,4,+,7=,4,+,9=,3,+,9=,5,+,8=,12,10,11,13,3,14,11,12,12,1,11,13,12,在里填上“”“”或“”。,3,、,7+916,8+413,7+612,6+512,5+714,3+811,12,16,=,11,11,=,算一算，每一种体育用品有多少？,一 班 有,二 班 有,一 共 有,7,个,6,个,5,个,8,个,4,个,7,个,_,个,_,个,_,个,13,13,11,一共有,(),个。,+,=,+,=,4,12,12,8,4,12,8,巩固练习：,一共有,(),个。,12,巩固练习：,+,=,+,=,3,9,12,9,3,12,算一算,：,9,+,8,=,17,9,+,6,=,15,8,+,5,=,8,+,6,=,14,13,7,+,5,=,7,+,6,=,13,12,7,+,7,=,6,+,5,=,11,14,谢谢！,