1、练习一(练习一(2 2) 苏教版小学数学一年级苏教版小学数学一年级( (下册下册) ) 主讲:刘蒙蒙 9 + 8 = 7 + 9= 17 - 9 =8 17 16 - 9 =7 16 + 9 = 14 9 + = 12 5 3 14 9 = 5 12 9 = 3 11 -9 12 -9 = 3 11 -9 17 -9 = 8 11 -9 16 -9 = 7 11 -9 11 -9 = 2 11 -9 13 -9 = 4 13 - 9 = 9 + 4 = 16 9 = 11 9 = 8 + 9 = 18 9 = 6 + 9 = 12 9 = 17 9 = 15 9 = 14 9 = 9 + 7
2、= 4 2 17 13 15 9 3 8 6 5 16 7 13 9 + 8 = 17 9 + 7 = 18 9 - 9 = 8 + 7- 9 = 12 0 15 6 4 9 8 15 11 16 -9 +3= 7 10 -9 11 17 -9 +9= 8 17 -9 11 12 -9 +6= 3 9 -9 -9 5 + 6 - 9= 11 2 -9 8 + 7 - 9= 15 6 -9 9 + 7 - 9= 16 7 有11支蜡烛,吹灭了9支, 还有多少支亮着? = (支) 11 9 2 树上原来有13只猴,下来3只。 树上还剩多少只? = (只) 13 3 10 小红做了12朵红花,小明做了9朵。小明至少还要做 几朵,才能超过小红? 超过 至少 小红 小明 13 9 = 4(朵) 12 - 9 + 1 = 4(朵) 回顾 自主学习检测