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___ | ___ | ___ |
30+5= | 70-50= | 14-6= | 18-9= | 8+4-6= |
12-8= | 16-5= | 30+40= | 75-70= | 45-40+6= |
7887 5+6
9 90+6
69 57-7
7+40
10099 15-9
6 85-5
8 13-6
4+8
装满 盒。
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