2026年口算基础训练一年级数学下册人教版第21页答案
1按规律填数






| 7 | | 9 | 10 | | | | | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| | 16 | | 18 | | |
| 10 | | 14 | | | |
| | 10 | | 20 |
| 20 | | 18 | | | 15 |
| | | 12 | | | 18 |

答案

| 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 15 | 16 | 17 | 18 | 19 | 20 |
| 10 | 12 | 14 | 16 | 18 | 20 |
| 5 | 10 | 15 | 20 |
| 20 | 19 | 18 | 17 | 16 | 15 |
| 8 | 10 | 12 | 14 | 16 | 18 |
数一数，写一写


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答案

11
20
16
12
15
20