1、整理和复习（一）小学一年级 数学 129 314716813411612879548口算比赛破十法想加算减法1082224因为 4 8 12所以 128420以内的退位减法11-912-913-914-915-916-917-918-911-812-813-814-815-816-817-811-712-713-714-715-716-711-612-613-614-615-611-512-513-514-511-412-413-411-312-311-2明明把这些20以内退位减法的算式整理一下。兰兰11-912-913-914-915-916-917-918-911-812-813-814-
2、815-816-817-811-712-713-714-715-716-711-612-613-614-615-611-512-513-514-511-412-413-411-312-311-2这些算式的被减数都是11。兰兰11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-2兰兰可以按减数从大到小的顺序把这些算式排成一行。11-912-913-914-915-916-917-918-911-812-813-814-815-816-817-811-712-713-714-715-716-711-612-613-614-615-611-512-513-514-511-41
3、2-413-411-312-311-2明明12-913-915-917-918-911-812-813-814-815-816-817-811-712-713-714-715-716-711-612-613-614-615-611-512-513-514-511-412-413-411-312-311-211-914-916-9这些算式的减数都是9。明明明明可以按被减数从小到大的顺序把这些算式排成一列。12-913-915-917-918-914-916-911-9可以把算式整理在表格里。11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-914-915
4、-916-917-918-9数学书24页11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-914-915-916-917-918-9-8121212121212-7-6-5-4-3我是这样整理的兰兰11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-6 13-5 13-414-915-916-917-918-9-8121212121212-7-6-5-4-3我是这样整理的兰兰11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13
5、-7 13-6 13-5 13-414-9 14-8 14-7 14-6 14-515-916-917-918-9-8121212121212-7-6-5-4-3我是这样整理的兰兰11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-6 13-5 13-414-9 14-8 14-7 14-6 14-515-9 15-8 15-7 15-616-917-918-9-8121212121212-7-6-5-4-3我是这样整理的兰兰11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13
6、-8 13-7 13-6 13-5 13-414-9 14-8 14-7 14-6 14-515-9 15-8 15-7 15-616-9 16-8 16-717-918-9-8121212121212-7-6-5-4-3我是这样整理的兰兰11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-6 13-5 13-414-9 14-8 14-7 14-6 14-515-9 15-8 15-7 15-616-9 16-8 16-717-917-818-9-8121212121212-7-6-5-4-3我是这样整理的兰兰11-9 1
7、1-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 14-9 15-9 16-9 17-9 18-9 8我是这样整理的明明 8 8 8 8 811-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 814-9 815-9 816-9 817-9 818-9 812-我是这样整理的明明13-14-15-16-17-11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-714-9 14-8 14-715-9 15-8 15-716-9 16-8 16-717-917-8
8、18-9-81212-7我是这样整理的明明11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-614-9 14-8 14-7 14-615-9 15-8 15-7 15-616-9 16-8 16-717-917-818-9-8121212-7-6我是这样整理的明明11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-6 13-514-9 14-8 14-7 14-6 14-515-9 15-8 15-7 15-616-9 16-8 16-717-917-8
9、18-9-812121212-7-6-5我是这样整理的明明11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-6 13-5 13-414-9 14-8 14-7 14-6 14-515-9 15-8 15-7 15-616-9 16-8 16-717-917-818-9-81212121212-7-6-5-4我是这样整理的明明11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-6 13-5 13-414-9 14-8 14-7 14-6 14-515-9
10、15-8 15-7 15-616-9 16-8 16-717-917-818-9-8121212121212-7-6-5-4-3我是这样整理的明明11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-6 13-5 13-414-9 14-8 14-7 14-6 14-515-9 15-8 15-7 15-616-9 16-8 16-717-917-818-9-8121212121212-7-6-5-4-3这一行算式的结果有什么规律？11-9=11-8=11-7=11-6=11-5=11-4=11-3=11-2=23456789
11、+1+1+1+1+1+1+111-9=11-8=11-7=11-6=11-5=11-4=11-3=11-2=23456789+1+1+1+1+1+1+1-1-1-1-1-1-1-111-9 11-8 11-7 11-6 11-5 11-4 11-3 11-212-913-9 13-8 13-7 13-6 13-5 13-414-9 14-8 14-7 14-6 14-515-9 15-8 15-7 15-616-9 16-8 16-717-917-818-9-8121212121212-7-6-5-4-3任选一列算一算，结果有什么规律？11-9=12-9=13-9=14-9=15-9=16-9
12、=17-9=18-9=23456789+1+1+1+1+1+1+1兰兰11-9=12-9=13-9=14-9=15-9=16-9=17-9=18-9=23456789+1+1+1+1+1+1+1+1+1+1+1+1+1+1兰兰？个11个（个）=1165-11个？个13支？支（支）=13-49彩粉笔今天我收了7棵白菜，14棵卷心菜。（1）卷心菜比白菜多几棵？白菜（棵）=14-77（2）白菜比卷心菜少几棵？（棵）=14-77卷心菜和白菜同样多的7棵卷心菜比白菜多的卷心菜小丽得了12朵。作业评比小林小丽小东小丽比小林多得了几朵？（朵）=12-93小丽比小林多得了几朵？小林小丽得了12朵。口答：小丽比小林多得了3朵。我们一共折了14只纸船，其中黄色的有6只。我折了8只。小月折了几只？我们一共折了14只纸船，其中黄色的有6只。我折了8只。（只）=14-86小月折了几只？小军 小月我们一共折了14只纸船，其中黄色的有6只。我折了8只。小月 小军白色小船有几只？我们一共折了14只纸船，其中黄色的有6只。（只）=14-68下面是育英学校今年植树的棵数 16棵 9棵 5棵多多少棵？比（棵）=1697-明明再 见
