第3单元 角的初步认识-【优佳好】2023-2024学年二年级上册数学口算计算能力提升（人教版）

单元 3 　 第 1 课时　 认识角 2 年级 上 R 25 + 12 = 63 + 14 = 85 - 13 = 57 - 8 = 27 + 36 = 67 - 34 = 13 + 52 = 31 + 47 = 40 - 22 = 21 + 45 = 72 - 9 = 64 - 44 = 53 + 16 = 42 + 47 = 96 - 45 = 94 - 34 = 27 - 18 = 87 - 54 = 80 + 10 = 57 + 21 = 81 - 43 = 35 + 46 = 72 - 28 = 53 + 24 = 66 - 35 = 65 - 17 = 48 - 22 = 80 - 39 = 72 - 29 = 42 + 19 = 93 - 56 = 63 + 35 = 54 - 38 = 79 - 56 = 27 + 48 = 82 - 53 = 62 - 27 = 96 - 30 = 19 + 20 = 46 - 12 = 28 + 28 = 90 - 49 = 86 - 27 = 73 - 26 - 27 = 35 + 28 - 29 = 40 - (53 - 26) = 62 单元 3 　 第 2 课时　 认识直角 2 年级 上 R 32 + 14 = 28 + 50 = 48 - 44 = 72 - 41 = 23 + 15 = 35 + 9 = 49 + 9 = 65 - 40 = 33 - 18 = 25 + 8 = 47 - 36 = 88 - 62 = 64 - 25 = 17 + 40 = 45 + 19 = 74 - 25 = 37 - 12 = 94 - 72 = 73 + 9 = 13 + 75 = 42 + 22 = 45 + 27 = 70 - 38 = 52 + 47 = 73 - 26 = 67 - 54 = 29 + 38 = 32 + 40 = 81 - 29 = 50 - 22 = 19 + 67 = 73 - 56 = 52 - 27 = 39 - 24 = 50 + 13 = 16 + 31 = 74 + 18 = 25 + 7 = 96 - 50 = 78 + 13 = 53 - 24 = 76 + 17 = 81 - 45 - 14 = 73 - 26 + 13 = 64 + 29 - 48 = 53 - (23 + 18) = 72 单元 3 　 第 3 课时　 认识锐角、钝角 2 年级 上 R 11 + 24 = 9 + 35 = 64 - 23 = 53 - 40 = 35 - 24 = 15 + 71 = 61 - 6 = 15 + 65 = 48 - 27 = 82 - 51 = 64 - 31 = 34 + 42 = 75 - 39 = 65 - 9 = 57 - 8 = 42 - 30 = 64 - 48 = 23 + 43 = 24 + 64 = 24 + 45 = 37 + 22 = 93 - 58 = 72 - 36 = 60 + 37 = 93 - 48 = 54 - 27 = 36 + 29 = 63 - 28 = 65 - 27 = 22 + 39 = 48 - 18 = 80 - 47 = 88 - 36 = 77 - 37 = 25 + 17 = 70 - 35 = 62 - 47 = 26 + 34 = 75 - 36 = 53 + 27 = 70 - 48 = 54 + 29 = 68 - 28 = 65 - 55 + 13 = 18 + (43 - 25) = 80 + 17 - 48 = 82 单元 3 　 第 4 课时　 解决问题 2 年级 上 R 35 + 12 = 67 - 55 = 55 - 17 = 60 - 7 = 42 - 36 = 24 + 64 = 81 - 18 = 92 - 70 = 66 - 20 = 8 + 45 = 87 - 76 = 33 + 33 = 75 - 36 = 64 - 36 = 34 + 34 = 50 - 27 = 40 - 18 = 81 - 26 = 55 - 27 = 90 - 29 = 52 + 18 = 93 - 58 = 72 - 36 = 60 + 37 = 37 + 29 = 54 - 27 = 36 + 29 = 63 - 28 = 64 - 25 = 22 + 39 = 48 - 18 = 80 - 47 = 57 - 26 = 27 + 16 = 65 - 50 = 11 + 33 = 75 - 38 = 31 - 18 = 14 + 29 = 28 + 20 = 80 - 36 = 28 + 36 = 57 - 29 = 63 + (42 - 13) = 97