11-8 12-8= 十几减8, 13 是几加2 14 888 34567 16-8=8
1 1 - 8 = 3 1 2 - 8 = 4 1 3 - 8 = 5 1 4 - 8 = 6 1 5 - 8 = 7 1 6 - 8 = 8 十几减 8 , 是几加 2
你发现了什么? 11-7=4 12-7=5 13-7=6 14-7=7 15-7=8 16-7=9
11 - 7 = 12 - 7 = 13 - 7 = 14 - 7 = 15 - 7 = 16 - 7 = 你发现了什么? 456789