整理和复习
整理和复习
+8=17□+9=164+9=□ 17-9=口16-7=口13-口=9 17-8=16-9=139
□+8=17 □+9=16 4+9=□ 17-9=□ 16-7=□ 13-□=9 17-8=□ 16-9=□ 13-9=□
你发现了么 9+8=177+9=164+9=13 17-9=816-7=913-4=9 17-8=916-9=7139
9+8=17 7+9=16 4+9=13 17-9=8 16-7=9 13-4=9 17-8=9 16-9=7 13-9=4 你发现了什么 ？
找规律填一填 11911-8 116 11-4 11-2 12-9 12-7 12-5 12-3 13-913-8 13-6 13-4 14-914-814-7 14-5 15-9 15-6 16-916-816-7 17-917-8 18-9
11-9 12-9 13-9 14-9 15-9 16-9 17-9 18-9 11-8 13-8 14-8 16-8 17-8 12-7 14-7 16-7 11-6 13-6 15-6 12-5 14-5 11-4 13-4 12-3 11-2
11-911-811-711611-5114 -3112 12912812-712612-512-4123 13913-813-713-613-5134 14914814714-6145 15915-815-715-6 16-916-816-7 17917-8 18-9
11-9 12-9 13-9 14-9 15-9 16-9 17-9 18-9 11-8 12-8 13-8 14-8 15-8 16-8 17-8 11-7 12-7 13-7 14-7 15-7 16-7 11-6 12-6 13-6 14-6 15-6 11-5 12-5 13-5 14-5 11-4 12-4 13-4 11-3 12-3 11-2