内容正文:
单元三 第 1 课时 认识乘法
2 年级 上 SJ
22 + 16 = 78 - 32 = 70 - 8 = 51 + 15 =
35 + 42 = 36 - 32 = 98 - 64 = 11 + 55 =
28 + 13 = 36 + 50 = 90 - 50 = 47 - 34 =
55 - 23 = 96 - 72 = 18 + 61 = 26 + 31 =
46 + 16 = 65 - 18 = 47 - 8 = 99 - 55 =
67 - 32 = 96 - 58 = 58 + 15 = 39 + 34 =
70 - 24 = 73 - 35 = 46 + 29 = 45 + 26 =
85 - 39 = 63 - 18 = 72 + 22 = 53 + 42 =
71 - 49 = 90 - 48 = 63 - 22 = 75 - 58 =
62 - 57 = 36 + 36 = 48 + 27 = 54 - 29 =
75 - 46 - 17 = 82 + 17 - 52 = 47 + 36 - 27 =
97 - 25 - 8 = 36 + 54 - 30 = 58 + 20 + 10 =
31
单元三 第 2 课时 练习四(1)
2 年级 上 SJ
41 + 30 = 31 + 48 = 79 - 42 = 27 + 36 =
27 - 14 = 42 - 17 = 51 - 27 = 36 + 35 =
73 - 48 = 27 + 16 = 53 - 29 = 51 - 24 =
66 - 24 = 36 + 16 = 36 + 17 = 52 - 28 =
45 + 26 = 16 + 15 = 26 - 18 = 72 - 19 =
63 - 47 = 45 + 22 = 87 - 21 = 42 + 27 =
35 - 28 = 31 - 7 = 94 - 14 = 80 - 22 =
54 + 26 = 63 + 17 = 46 + 26 = 58 - 32 =
60 - 48 = 66 - 49 = 41 - 32 = 68 + 27 =
83 - 74 = 33 + 45 = 54 - 29 = 93 - 42 =
58 - 39 + 29 = 36 + 48 - 36 = 55 - 18 + 52 =
45 + 16 - 21 = 17 + 26 + 25 = 74 - 20 - 9 =
41
单元三 第 3 课时 练习四(2)
2 年级 上 SJ
18 + 32 = 45 - 31 = 6 + 78 = 70 + 28 =
60 - 27 = 11 + 56 = 36 + 43 = 71 - 8 =
73 - 15 = 61 - 41 = 63 + 21 = 45 + 53 =
82 - 37 = 31 - 17 = 45 - 27 = 40 + 19 =
64 + 22 = 8 + 56 = 48 - 12 = 49 - 21 =
93 - 45 = 58 - 13 = 49 - 18 = 12 + 47 =
16 + 53 = 25 + 44 = 88 + 6 = 95 - 25 =
33 + 56 = 46 + 23 = 36 + 54 = 58 + 12 =
64 - 39 = 71 + 15 = 78 - 37 = 17 + 38 =
81 - 47 = 45 + 16 = 96 - 75 = 27 + 54 =
78 - 26 - 31 = 96 - 72 + 38 = 17 + 26 + 25 =
16 + 33 + 27 = 85 - 27 - 39 = 80 - 26 + 14 =
51
单元三 第 4 课时 1 ~4 的乘法口诀
2 年级 上 SJ
1 × 3 = 1 × 4 = 2 × 2 = 3 × 1 =
3 × 2 = 3 × 3 = 1 × 2 = 1 × 1 =
4 × 1 = 2 × 3 = 2 × 4 = 3 × 4 =
15 + 27 = 14 + 26 = 4 × 4 = 56 - 20 =
50 - 26 = 25 - 12 = 64 + 7 = 29 - 18 =
62 + 18 = 51 + 16 = 42 - 12 = 33 + 7 =
27 + 29 = 29 - 5 = 18 + 8 = 15 - 13 =
45 - 28 = 16 + 14 = 71 - 9 = 22 + 28 =
45 - 29 = 36 + 28 = 60 - 34 = 52 - 14 =
47 + 47 = 72 - 49 = 46 + 29 = 66 - 28 =
85 - 47 - 29 = 16 + 49 - 58 = 66 +