《2025年一本口算能力训练一年级数学下册人教版》

1. 口算。（建议用时6分钟）
7 + 40 =
50 + 5 =
6 + 80 =
30 + 9 =
47 - 7 =
55 - 50 =
86 - 6 =
39 - 30 =
47 - 40 =
55 - 5 =
86 - 80 =
36 - 6 =
30 + 2 =
40 + 9 =
20 + 5 =
80 + 1 =
67 - 7 =
54 - 50 =
24 - 4 =
64 - 60 =
32 - 2 =
32 - 30 =
22 - 2 =
22 - 20 =
2 + 50 =
60 + 7 =
50 + 4 =
6 + 40 =
46 - 6 =
98 - 90 =
30 + 3 =
9 + 70 =
10 + 8 =
29 - 9 =
6 + 30 =
45 - 5 =
76 - 70 =
6 + 60 =
78 - 70 =
83 - 3 =
80 + 8 =
25 - 20 =
39 - 9 =
5 + 30 =
50 + 6 =
33 - 30 =
68 - 8 =
90 + 4 =

答案： 47 55 86 39
40 5 80 9
7 50 6 30
32 49 25 81
60 4 20 4
30 2 20 2
52 67 54 46
40 8 33 79
18 20 36 40
6 66 8 80
88 5 30 35
56 3 60 94

2. 在□里填上合适的数。（建议用时2分钟）
□ - 9 = 30
98 - □ = 90
□ + 40 = 46
65 - □ = 60
□ + 3 = 83
□ + 50 = 57
□ - 6 = 70
2 + □ = 32
□ + 4 = 64
70 + □ = 73
□ + 40 = 49
71 - □ = 1

答案： 39 8 6
5 80 7
76 30 60
3 9 70

3. 新学期，发新书。开心小学一年级二班一共有38名同学，已经发了30本数学书和8本语文书，还要发 ( ) 本数学书，( ) 本语文书。（建议用时2分钟）

答案： 8 30