第2单元 20以内的退位减法-【优佳好】2023-2024学年一年级下册数学口算计算能力提升（人教版）

单元 2 　 第 1 课时　 十几减 9(教材 P10) 1 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　10 - 9 = 8 + 3 = 19 - 9 = 12 - 9 = 7 + 3 = 13 - 9 = 2 + 8 = 6 + 4 = 14 - 4 = 18 - 9 = 7 + 7 = 3 + 5 = 9 - 8 = 7 + 2 = 6 + 1 = 8 - 4 = 15 - 9 = 5 + 4 = 16 - 9 = 7 + 5 = 8 + 6 = 15 - 4 = 17 - 7 = 3 + 9 = 4 + 8 = 17 - 9 = 11 - 9 = 9 + 10 = 5 + 2 = 6 - 6 = 15 - 10 = 2 + 9 = 10 - 9 + 4 = 17 - 7 + 9 = 14 - 9 + 2 = 11 - 9 + 6 = 8 + 4 - 9 = 5 + 8 - 3 = 12 - 9 + 2 = 18 - 9 + 3 = 9 + 7 - 6 = 15 - 9 + 8 = 8 + 9 - 3 = 3 + 9 + 2 = 7 + 2 + 3 = 9 - 5 + 8 = 10 - 3 + 9 = 15 - 5 + 7 = 　 　 　 　 　 　 　 　 　 　 　 　 6 单元 2 　 第 2 课时　 练习课(教材 P11) 1 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　9 + 5 = 18 - 10 = 9 + 10 = 9 - 7 = 17 - 7 = 3 + 8 = 15 - 9 = 10 + 3 = 14 - 9 = 4 + 9 = 16 - 9 = 9 + 6 = 18 - 8 = 6 + 8 = 7 + 7 = 15 - 5 = 18 - 9 = 11 - 9 = 9 + 2 = 9 + 3 = 17 - 9 = 9 + 1 = 19 - 9 = 12 - 9 = 9 + 7 = 8 + 9 = 4 + 9 = 13 - 9 = 7 + 6 - 9 = 3 + 8 - 9 = 15 - 9 + 7 = 12 - 9 + 8 = 16 - 9 - 4 = 17 - 9 - 6 = 10 + 5 - 9 = 18 - 9 - 2 = 5 + 8 - 9 = 12 - 9 + 2 = 16 - 3 - 9 = 13 - 9 + 5 = 8 + 7 - 9 = 14 - 9 + 6 = 10 + 8 - 9 = 10 + 6 - 9 = 　 　 　 　 　 　 　 　 　 　 　 　 7 单元 2 　 第 3 课时　 十几减 8、7、6(1)(教材 P13 ~ 14) 1 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　15 - 7 = 14 - 6 = 14 - 8 = 15 - 6 = 11 - 6 = 16 - 7 = 13 - 7 = 12 - 6 = 12 - 7 = 16 - 6 = 14 - 9 = 15 - 8 = 16 - 8 = 12 - 8 = 17 - 7 = 13 - 6 = 17 - 8 = 15 - 9 = 11 - 8 = 14 - 7 = 6 + 9 = 14 - 4 = 19 - 10 = 11 - 7 = 17 - 9 = 12 - 9 = 15 - 5 = 13 - 8 = 18 - 7 - 9 = 13 - 7 + 5 = 10 - 6 + 8 = 15 - 7 + 6 = 8 + 5 - 6 = 6 + 7 - 9 = 7 + 8 - 9 = 5 + 8 - 8 = 11 - 7 + 5 = 15 - 9 + 3 = 5 + 9 - 8 = 2 + 9 - 7 = 4 + 8 - 7 = 14 - 8 + 3 = 12 - 6 + 5 = 13 - 8 + 7 = 　 　 　 　 　 　 　 　 　 　 　 　 8 单元 2 　 第 4 课时　 十几减 8、7、6(2)(教材 P13 ~ 14) 1 年级 下 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　12 - 6 = 14 - 7 = 15 - 6 = 11 - 7 = 14 - 8 = 11 - 8 = 13 - 6 = 12 - 7 = 15 - 8 = 13 - 9 = 14 - 6 = 11 - 9 = 11 - 6 = 13 - 8 = 15 - 7 = 15 - 9 = 7 + 8 = 16 - 8 = 16 - 6 = 17 - 8 = 16 - 7 =