【二十以内减法口诀表】在小学数学学习中,减法是基础运算之一。掌握二十以内减法的口诀,有助于提高计算速度和准确性,为后续更复杂的数学学习打下坚实的基础。以下是对“二十以内减法口诀表”的总结与整理,以文字加表格的形式呈现,便于理解和记忆。
一、二十以内减法口诀表简介
二十以内减法指的是被减数和减数都在1到20之间的减法运算。这类减法通常出现在一年级或二年级的数学教学中,是学生初步建立数感和运算能力的重要环节。
为了帮助孩子们更快地掌握这些减法算式,教师和家长常通过口诀的方式进行教学。口诀形式简洁易记,能够有效提升学生的计算效率。
二、二十以内减法口诀表(文字版)
以下是一些常见的二十以内减法口诀,涵盖了从1到20的减法运算:
- 1 - 1 = 0
- 2 - 1 = 1
- 2 - 2 = 0
- 3 - 1 = 2
- 3 - 2 = 1
- 3 - 3 = 0
- 4 - 1 = 3
- 4 - 2 = 2
- 4 - 3 = 1
- 4 - 4 = 0
- 5 - 1 = 4
- 5 - 2 = 3
- 5 - 3 = 2
- 5 - 4 = 1
- 5 - 5 = 0
- 6 - 1 = 5
- 6 - 2 = 4
- 6 - 3 = 3
- 6 - 4 = 2
- 6 - 5 = 1
- 6 - 6 = 0
- 7 - 1 = 6
- 7 - 2 = 5
- 7 - 3 = 4
- 7 - 4 = 3
- 7 - 5 = 2
- 7 - 6 = 1
- 7 - 7 = 0
- 8 - 1 = 7
- 8 - 2 = 6
- 8 - 3 = 5
- 8 - 4 = 4
- 8 - 5 = 3
- 8 - 6 = 2
- 8 - 7 = 1
- 8 - 8 = 0
- 9 - 1 = 8
- 9 - 2 = 7
- 9 - 3 = 6
- 9 - 4 = 5
- 9 - 5 = 4
- 9 - 6 = 3
- 9 - 7 = 2
- 9 - 8 = 1
- 9 - 9 = 0
- 10 - 1 = 9
- 10 - 2 = 8
- 10 - 3 = 7
- 10 - 4 = 6
- 10 - 5 = 5
- 10 - 6 = 4
- 10 - 7 = 3
- 10 - 8 = 2
- 10 - 9 = 1
- 10 - 10 = 0
- 11 - 1 = 10
- 11 - 2 = 9
- 11 - 3 = 8
- 11 - 4 = 7
- 11 - 5 = 6
- 11 - 6 = 5
- 11 - 7 = 4
- 11 - 8 = 3
- 11 - 9 = 2
- 11 - 10 = 1
- 11 - 11 = 0
- 12 - 1 = 11
- 12 - 2 = 10
- 12 - 3 = 9
- 12 - 4 = 8
- 12 - 5 = 7
- 12 - 6 = 6
- 12 - 7 = 5
- 12 - 8 = 4
- 12 - 9 = 3
- 12 - 10 = 2
- 12 - 11 = 1
- 12 - 12 = 0
- ……(依此类推至20)
三、二十以内减法口诀表(表格版)
| 被减数 | 减数 | 结果 |
| 1 | 1 | 0 |
| 2 | 1 | 1 |
| 2 | 2 | 0 |
| 3 | 1 | 2 |
| 3 | 2 | 1 |
| 3 | 3 | 0 |
| 4 | 1 | 3 |
| 4 | 2 | 2 |
| 4 | 3 | 1 |
| 4 | 4 | 0 |
| 5 | 1 | 4 |
| 5 | 2 | 3 |
| 5 | 3 | 2 |
| 5 | 4 | 1 |
| 5 | 5 | 0 |
| 6 | 1 | 5 |
| 6 | 2 | 4 |
| 6 | 3 | 3 |
| 6 | 4 | 2 |
| 6 | 5 | 1 |
| 6 | 6 | 0 |
| 7 | 1 | 6 |
| 7 | 2 | 5 |
| 7 | 3 | 4 |
| 7 | 4 | 3 |
| 7 | 5 | 2 |
| 7 | 6 | 1 |
| 7 | 7 | 0 |
| 8 | 1 | 7 |
| 8 | 2 | 6 |
| 8 | 3 | 5 |
| 8 | 4 | 4 |
| 8 | 5 | 3 |
| 8 | 6 | 2 |
| 8 | 7 | 1 |
| 8 | 8 | 0 |
| 9 | 1 | 8 |
| 9 | 2 | 7 |
| 9 | 3 | 6 |
| 9 | 4 | 5 |
| 9 | 5 | 4 |
| 9 | 6 | 3 |
| 9 | 7 | 2 |
| 9 | 8 | 1 |
| 9 | 9 | 0 |
| 10 | 1 | 9 |
| 10 | 2 | 8 |
| 10 | 3 | 7 |
| 10 | 4 | 6 |
| 10 | 5 | 5 |
| 10 | 6 | 4 |
| 10 | 7 | 3 |
| 10 | 8 | 2 |
| 10 | 9 | 1 |
| 10 | 10 | 0 |
(注:以上为部分示例,完整表格可扩展至20)
四、小结
二十以内减法口诀表是小学生学习基本运算的重要工具。通过反复练习和记忆,孩子可以更快地掌握减法技巧,提高计算准确率和速度。建议家长和老师结合游戏、卡片等方式进行教学,增强孩子的兴趣和参与度。
希望本文对您理解二十以内减法有所帮助!


