在小学一年级阶段，数学学习的重点之一就是掌握20以内的加减法。这是孩子数学思维发展的基础，也是今后学习更复杂运算的重要铺垫。为了帮助孩子们更好地巩固这一知识点，下面整理了一份小学一年级20以内加减法口算题大全，适合家长辅导或老师布置作业使用。
一、20以内加法口算题（100题）
1. 5 + 3 =
2. 7 + 2 =
3. 4 + 6 =
4. 9 + 1 =
5. 8 + 4 =
6. 3 + 7 =
7. 6 + 5 =
8. 2 + 9 =
9. 10 + 5 =
10. 12 + 3 =
11. 15 + 2 =
12. 11 + 6 =
13. 14 + 4 =
14. 13 + 5 =
15. 10 + 9 =
16. 7 + 8 =
17. 6 + 9 =
18. 5 + 9 =
19. 4 + 8 =
20. 3 + 9 =
21. 8 + 7 =
22. 9 + 6 =
23. 10 + 8 =
24. 11 + 7 =
25. 12 + 6 =
26. 13 + 4 =
27. 14 + 3 =
28. 15 + 2 =
29. 16 + 1 =
30. 17 + 2 =
31. 18 + 1 =
32. 19 + 0 =
33. 10 + 10 =
34. 12 + 5 =
35. 13 + 6 =
36. 14 + 5 =
37. 15 + 4 =
38. 16 + 3 =
39. 17 + 2 =
40. 18 + 1 =
41. 19 + 1 =
42. 10 + 7 =
43. 11 + 8 =
44. 12 + 7 =
45. 13 + 7 =
46. 14 + 6 =
47. 15 + 5 =
48. 16 + 4 =
49. 17 + 3 =
50. 18 + 2 =
51. 19 + 1 =
52. 2 + 15 =
53. 3 + 16 =
54. 4 + 17 =
55. 5 + 18 =
56. 6 + 17 =
57. 7 + 16 =
58. 8 + 15 =
59. 9 + 14 =
60. 10 + 12 =
61. 11 + 9 =
62. 12 + 8 =
63. 13 + 7 =
64. 14 + 6 =
65. 15 + 5 =
66. 16 + 4 =
67. 17 + 3 =
68. 18 + 2 =
69. 19 + 1 =
70. 20 + 0 =
71. 1 + 19 =
72. 2 + 18 =
73. 3 + 17 =
74. 4 + 16 =
75. 5 + 15 =
76. 6 + 14 =
77. 7 + 13 =
78. 8 + 12 =
79. 9 + 11 =
80. 10 + 10 =
81. 11 + 9 =
82. 12 + 8 =
83. 13 + 7 =
84. 14 + 6 =
85. 15 + 5 =
86. 16 + 4 =
87. 17 + 3 =
88. 18 + 2 =
89. 19 + 1 =
90. 20 + 0 =
91. 5 + 10 =
92. 6 + 10 =
93. 7 + 10 =
94. 8 + 10 =
95. 9 + 10 =
96. 10 + 10 =
97. 11 + 9 =
98. 12 + 8 =
99. 13 + 7 =
100. 14 + 6 =
二、20以内减法口算题（100题）
1. 10 - 5 =
2. 9 - 3 =
3. 8 - 2 =
4. 7 - 4 =
5. 6 - 3 =
6. 5 - 2 =
7. 4 - 1 =
8. 3 - 2 =
9. 2 - 1 =
10. 10 - 2 =
11. 11 - 3 =
12. 12 - 4 =
13. 13 - 5 =
14. 14 - 6 =
15. 15 - 7 =
16. 16 - 8 =
17. 17 - 9 =
18. 18 - 10 =
19. 19 - 10 =
20. 20 - 10 =
21. 15 - 5 =
22. 14 - 4 =
23. 13 - 3 =
24. 12 - 2 =
25. 11 - 1 =
26. 10 - 1 =
27. 9 - 1 =
28. 8 - 1 =
29. 7 - 1 =
30. 6 - 1 =
31. 5 - 1 =
32. 4 - 1 =
33. 3 - 1 =
34. 2 - 1 =
35. 1 - 0 =
36. 10 - 3 =
37. 11 - 4 =
38. 12 - 5 =
39. 13 - 6 =
40. 14 - 7 =
41. 15 - 8 =
42. 16 - 9 =
43. 17 - 10 =
44. 18 - 10 =
45. 19 - 10 =
46. 20 - 10 =
47. 10 - 4 =
48. 11 - 5 =
49. 12 - 6 =
50. 13 - 7 =
51. 14 - 8 =
52. 15 - 9 =
53. 16 - 10 =
54. 17 - 10 =
55. 18 - 10 =
56. 19 - 10 =
57. 20 - 10 =
58. 10 - 6 =
59. 11 - 6 =
60. 12 - 7 =
61. 13 - 8 =
62. 14 - 9 =
63. 15 - 10 =
64. 16 - 10 =
65. 17 - 10 =
66. 18 - 10 =
67. 19 - 10 =
68. 20 - 10 =
69. 10 - 7 =
70. 11 - 7 =
71. 12 - 8 =
72. 13 - 9 =
73. 14 - 10 =
74. 15 - 10 =
75. 16 - 10 =
76. 17 - 10 =
77. 18 - 10 =
78. 19 - 10 =
79. 20 - 10 =
80. 10 - 8 =
81. 11 - 8 =
82. 12 - 9 =
83. 13 - 10 =
84. 14 - 10 =
85. 15 - 10 =
86. 16 - 10 =
87. 17 - 10 =
88. 18 - 10 =
89. 19 - 10 =
90. 20 - 10 =
91. 10 - 9 =
92. 11 - 9 =
93. 12 - 10 =
94. 13 - 10 =
95. 14 - 10 =
96. 15 - 10 =
97. 16 - 10 =
98. 17 - 10 =
99. 18 - 10 =
100. 19 - 10 =
三、小贴士：如何提高口算能力？
1. 每天练习：坚持每天做几道题，形成习惯。
2. 结合实物：用小石子、积木等物品辅助理解加减法。
3. 游戏化学习：通过数字卡片、数学游戏等方式增加趣味性。
4. 鼓励为主：及时表扬孩子的进步，增强自信心。
这份“小学一年级20以内加减法口算题大全”不仅内容全面，而且适合不同层次的学生进行练习。希望对广大家长和老师有所帮助，也祝愿每一位小朋友都能在数学学习中收获快乐与成长！
