知识点
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9+2=11 |
8+3=11 |
7+4=11 |
6+5=11 |
5+6=11 |
4+7=11 |
3+8=11 |
2+9=11 |
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9+3=12 |
8+4=12 |
7+5=12 |
6+6=12 |
5+7=12 |
4+8=12 |
3+9=12 |
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9+4=13 |
8+5=13 |
7+6=13 |
6+7=13 |
5+8=13 |
4+9=13 |
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9+5=14 |
8+6=14 |
7+7=14 |
6+8=14 |
5+9=14 |
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9+6=15 |
8+7=15 |
7+8=15 |
6+9=15 |
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9+7=16 |
8+8=16 |
7+9=16 |
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9+8=17 |
8+9=17 |
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9+9=18 |
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11-2=9 |
12-3=9 |
13-4=9 |
14-5=9 |
15-6=9 |
16-7=9 |
17-8=9 |
18-9=9 |
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11-3=8 |
12-4=8 |
13-5=8 |
14-6=8 |
15-7=8 |
16-8=8 |
17-9=8 |
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11-4=7 |
12-5=7 |
13-6=7 |
14-7=7 |
15-8=7 |
16-9=7 |
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11-5=6 |
12-6=6 |
13-7=6 |
14-8=6 |
15-9=6 |
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11-6=5 |
12-7=5 |
13-8=5 |
14-9=5 |
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11-7=4 |
12-8=4 |
13-9=4 |
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11-8=3 |
12-9=3 |
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11-9=2 |
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题库
课后题