1、整理和复习7989620以内的退位减法以内的退位减法:11-918-911-811-711-611-511-411-311-212-912-812-712-612-512-412-313-913-813-713-613-513-414-914-814-714-614-515-915-815-715-616-916-816-717-917-816-911-611-511-411-311-911-811-711-2=3=2=4=5=6=7=8=9=3=2=4=5=6=7=8=9=3=2=4=5=6=7=8=9=3=2=4=5=6=7=9=8=9=3=2=4=5=6=7 -6 -5 -4 -3 -9
2、 -8 -7 -21111111111 111111=3=2=4=5=6=7=8=9=3=2=4=5=6=7=8=9=3=2=4=5=6=7=8=9=3=2=4=5=6=7=9=8=9=3=2=4=5=6=7 -6 -5 -4 -3 -9 -8 -7 -21111111111 11111118-912-913-914-915-916-917-911-91812131415161711-9-9-9-9-9-9-9-91812131415161711-9-9-9-9-9-9-9-912-812-712-612-512-412-313-813-713-613-513-414-814-714-614-
3、515-815-715-616-816-717-8算式宝宝排座位:算式宝宝排座位:11-611-511-411-311-9 11-811-711-218-912-913-914-915-916-917-9能接着刚刚的发现,把其他算式宝宝的位置找到吗?11-911-811-712-912-812-713-913-813-714-911-612-613-614-814-714-611-511-411-311-212-512-412-313-513-414-515-915-815-715-616-916-816-717-917-818-9计算表中的算式,看看你有什么发现?11-9=211-8=311
4、-7=412-9=312-8=412-7=513-9=413-8=513-7=614-9=511-6=512-6=613-6=714-8=614-7=714-6=811-5=611-4=711-3=811-2=912-5=712-4=812-3=913-5=813-4=914-5=915-9=615-8=715-7=815-6=916-9=716-8=816-7=917-9=817-8=918-9=911-911-811-712-912-812-713-913-813-714-911-612-613-614-814-714-611-511-411-311-212-512-412-313-513
5、-414-515-915-815-715-616-916-816-717-917-818-911-9=211-8=311-7=412-9=312-8=412-7=513-9=413-8=513-7=614-9=511-6=512-6=613-6=714-8=614-7=714-6=811-5=611-4=711-3=811-2=912-5=712-4=812-3=913-5=813-4=914-5=915-9=615-8=715-7=815-6=916-9=716-8=816-7=917-9=817-8=918-9=911-9=211-8=311-7=411-6=511-5=611-4=711
6、-3=811-2=913-9=413-8=513-7=613-6=713-5=813-4=912-9=312-8=412-7=512-6=614-9=514-8=614-7=714-6=812-5=712-4=812-3=914-5=915-9=615-8=715-7=815-6=916-9=716-8=816-7=917-9=817-8=918-9=911-7=412-7=513-7=614-7=715-7=816-7=911-6=512-6=613-6=714-6=811-5=611-4=711-3=811-2=912-5=712-4=812-3=913-5=813-4=914-5=915
7、-6=911-8=312-8=413-8=514-8=615-8=716-8=817-8=911-9=212-9=313-9=414-9=515-9=616-9=717-9=818-9=911-9=212-9=313-9=414-9=515-9=616-9=717-9=818-9=911-7=412-7=513-7=614-7=715-7=816-7=911-8=312-8=413-8=514-8=615-8=716-8=817-8=911-2=911-3=812-3=911-4=712-4=813-4=911-5=612-5=713-5=814-5=911-6=512-6=613-6=714
8、-6=815-6=911-2=911-3=812-3=911-4=712-4=813-4=911-5=612-5=713-5=814-5=913-7=612-6=611-5=614-8=615-9=611-7=412-7=514-7=715-7=812-6=611-6=513-6=714-6=811-4=711-3=812-5=712-4=813-5=811-8=312-8=413-8=515-8=716-8=811-9=212-9=313-9=414-9=516-9=717-9=816-7=911-2=912-3=913-4=914-5=915-6=917-8=918-9=916-7=911
9、-2=912-3=913-4=914-5=915-6=917-8=918-9=913-7=612-6=611-5=614-8=615-9=611-7=412-7=514-7=711-6=513-6=711-4=712-5=711-8=312-8=413-8=515-8=711-9=212-9=313-9=414-9=516-9=715-7=814-6=811-3=812-4=813-5=816-8=817-9=816-7=911-2=912-3=913-4=914-5=915-6=917-8=918-9=913-7=612-6=611-5=614-8=615-9=611-9=211-8=312
10、-9=311-7=412-8=413-9=412-7=511-6=513-8=514-9=514-7=713-6=711-4=712-5=715-8=716-9=715-7=814-6=811-3=812-4=813-5=816-8=817-9=816-7=911-2=912-3=913-4=914-5=915-6=917-8=918-9=913-7=612-6=611-5=614-8=615-9=611-9=211-8=311-7=412-9=312-8=412-7=513-9=413-8=513-7=614-9=511-6=512-6=613-6=714-8=614-7=714-6=811
11、-5=611-4=711-3=811-2=912-5=712-4=812-3=913-5=813-4=914-5=915-9=615-8=715-7=815-6=916-9=716-8=816-7=917-9=817-8=918-9=916-9=716-7=911-9=211-8=311-7=412-9=312-8=412-7=513-9=413-8=513-7=614-9=511-6=512-6=613-6=714-8=614-7=714-6=811-5=611-4=711-3=811-2=912-5=712-4=812-3=913-5=813-4=914-5=915-9=615-8=715
12、-7=815-6=916-9=716-8=816-7=917-9=817-8=918-9=912-6=613-6=714-7=714-6=811-5=611-4=711-3=811-2=912-5=712-4=812-3=913-5=813-4=914-5=915-7=815-6=916-8=816-7=911-9=211-8=311-7=412-9=312-8=412-7=513-9=413-8=513-7=614-9=511-6=514-8=615-9=615-8=716-9=717-9=817-8=918-9=912-6=613-6=714-7=714-6=811-5=611-4=711
13、-3=811-2=912-5=712-4=812-3=913-5=813-4=914-5=915-7=815-6=916-8=816-7=911-9=211-8=311-7=412-9=312-8=412-7=513-9=413-8=513-7=614-9=511-6=514-8=615-9=615-8=716-9=717-9=817-8=918-9=913-6=714-6=812-5=712-4=813-5=813-4=914-5=915-7=815-6=916-7=917-8=9第一关:先观察,再写算式:11 2=911 4=711 8=311 6=548611 第二关:把差是6的算式一组一组地写出来。12-6=611-5=613-7=614-8=615-9=6谢 谢