【20以内加减法练习题100题及参考答案(完整版)】在小学低年级的数学学习中,20以内的加减法是基础中的基础。它不仅关系到学生对数字的理解,更是后续多位数运算、混合运算等知识体系建立的关键。为了帮助孩子们更好地掌握这一知识点,下面整理了一份包含100道20以内加减法练习题的题目集,并附有详细的参考答案,方便家长或老师进行辅导与检测。
一、20以内加法练习题(50题)
1. 8 + 5 =
2. 7 + 6 =
3. 9 + 4 =
4. 10 + 3 =
5. 6 + 7 =
6. 5 + 9 =
7. 4 + 8 =
8. 3 + 9 =
9. 2 + 10 =
10. 1 + 12 =
11. 11 + 5 =
12. 12 + 3 =
13. 13 + 2 =
14. 14 + 1 =
15. 15 + 0 =
16. 16 + 2 =
17. 17 + 1 =
18. 18 + 1 =
19. 19 + 0 =
20. 20 + 0 =
21. 7 + 8 =
22. 6 + 9 =
23. 5 + 10 =
24. 4 + 11 =
25. 3 + 12 =
26. 2 + 13 =
27. 1 + 14 =
28. 10 + 6 =
29. 9 + 7 =
30. 8 + 8 =
31. 7 + 9 =
32. 6 + 10 =
33. 5 + 11 =
34. 4 + 12 =
35. 3 + 13 =
36. 2 + 14 =
37. 1 + 15 =
38. 10 + 7 =
39. 9 + 8 =
40. 8 + 9 =
41. 7 + 10 =
42. 6 + 11 =
43. 5 + 12 =
44. 4 + 13 =
45. 3 + 14 =
46. 2 + 15 =
47. 1 + 16 =
48. 10 + 8 =
49. 9 + 9 =
50. 8 + 10 =
二、20以内减法练习题(50题)
51. 15 - 5 =
52. 14 - 4 =
53. 13 - 3 =
54. 12 - 2 =
55. 11 - 1 =
56. 10 - 0 =
57. 9 - 3 =
58. 8 - 4 =
59. 7 - 5 =
60. 6 - 2 =
61. 5 - 1 =
62. 4 - 0 =
63. 10 - 5 =
64. 11 - 5 =
65. 12 - 6 =
66. 13 - 7 =
67. 14 - 8 =
68. 15 - 9 =
69. 16 - 10 =
70. 17 - 11 =
71. 18 - 12 =
72. 19 - 13 =
73. 20 - 14 =
74. 10 - 6 =
75. 11 - 7 =
76. 12 - 8 =
77. 13 - 9 =
78. 14 - 10 =
79. 15 - 11 =
80. 16 - 12 =
81. 17 - 13 =
82. 18 - 14 =
83. 19 - 15 =
84. 20 - 16 =
85. 10 - 7 =
86. 11 - 8 =
87. 12 - 9 =
88. 13 - 10 =
89. 14 - 11 =
90. 15 - 12 =
91. 16 - 13 =
92. 17 - 14 =
93. 18 - 15 =
94. 19 - 16 =
95. 20 - 17 =
96. 10 - 8 =
97. 11 - 9 =
98. 12 - 10 =
99. 13 - 11 =
100. 14 - 12 =
三、参考答案
1. 13
2. 13
3. 13
4. 13
5. 13
6. 14
7. 12
8. 12
9. 12
10. 13
11. 16
12. 15
13. 15
14. 15
15. 15
16. 18
17. 18
18. 19
19. 19
20. 20
21. 15
22. 15
23. 15
24. 15
25. 15
26. 15
27. 15
28. 16
29. 16
30. 16
31. 16
32. 16
33. 16
34. 16
35. 17
36. 16
37. 16
38. 17
39. 17
40. 17
41. 17
42. 17
43. 17
44. 17
45. 17
46. 17
47. 17
48. 18
49. 18
50. 18
51. 10
52. 10
53. 10
54. 10
55. 10
56. 10
57. 6
58. 4
59. 2
60. 4
61. 4
62. 4
63. 5
64. 6
65. 6
66. 6
67. 6
68. 6
69. 6
70. 6
71. 6
72. 6
73. 6
74. 4
75. 4
76. 4
77. 4
78. 4
79. 4
80. 4
81. 4
82. 4
83. 4
84. 4
85. 3
86. 3
87. 3
88. 3
89. 3
90. 3
91. 3
92. 3
93. 3
94. 3
95. 3
96. 2
97. 2
98. 2
99. 2
100. 2
通过反复练习这些题目,孩子们可以逐步提高计算速度和准确率,为今后更复杂的数学学习打下坚实的基础。建议每天完成10-20题,结合口算和笔算训练,效果更佳。