《2025年口算训练二年级数学上册北师大版双色升级版》

第55片
23 + 35 = 58 25 + 36 = 61 15 + 28 = 43
29 + 34 = 63 48 - 19 = 29 36 - 19 = 17
86 - 25 = 61 57 + 24 = 81 47 + 35 = 82
58 - 23 = 35 63 - 28 = 35 52 - 18 = 34
76 - 47 = 29 95 - 41 = 54 64 + 22 = 86
45 + 32 = 77 100 - 24 = 76 83 - 45 = 38
75 + 15 = 90 83 - 56 = 27 29 + 56 = 85
48 + 36 = 84 63 + 28 = 91 71 - 31 = 40
39 + 45 = 84 56 + 17 = 73 42 + 39 = 81
25 + 52 = 77 64 - 31 = 33 90 - 57 = 33

答案： 23 + 35 = 58
25 + 36 = 61
15 + 28 = 43
29 + 34 = 63
48 - 19 = 29
36 - 19 = 17
86 - 25 = 61
57 + 24 = 81
47 + 35 = 82
58 - 23 = 35
63 - 28 = 35
52 - 18 = 34
76 - 47 = 29
95 - 41 = 54
64 + 22 = 86
45 + 32 = 77
100 - 24 = 76
83 - 45 = 38
75 + 15 = 90
83 - 56 = 27
29 + 56 = 85
48 + 36 = 84
63 + 28 = 91
71 - 31 = 40
39 + 45 = 84
56 + 17 = 73
42 + 39 = 81
25 + 52 = 77
64 - 31 = 33
90 - 57 = 33

圈一圈,在点子图上用两种方式表示算式。
3 × 7 = $□$

2 × 9 = $□$

答案： 3×7=21
（圈法一：每行圈7个点，圈3行；圈法二：每列圈3个点，圈7列）
2×9=18
（圈法一：每行圈9个点，圈2行；圈法二：每列圈2个点，圈9列）

照样子写出加法算式和乘法算式。
3个5相加 5 + 5 + 5 = 15
5 × 3 = 15
4个8相加8+8+8+8=32
8×4=32
5个6相加6+6+6+6+6=30
6×5=30
6个2相加2+2+2+2+2+2=12
2×6=12

答案： 4个8相加 8+8+8+8=32
8×4=32
5个6相加 6+6+6+6+6=30
6×5=30
6个2相加 2+2+2+2+2+2=12
2×6=12