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149+4 128+5 9+82个十 10-46
5+7= | 5–4= | 18–8= | 8+5+ 2= |
15–10= | 6–3= | 7+7= | 3 + 7 + 9= |
11+7 = | 2+8= | 19–10= | 8 – 3 + 9= |
8+8= | 10–8= | 5+10= | 12 –2 + 4= |
10 + 8= | 11 –10= | 10 –7= | 9 + 10 –5= |
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☆☆☆☆☆☆☆☆
□○□ = □(个) | □○□ = □(个) |
□○□○□ = □(个) | □○□○□ = □(个) |
□○□= □(本)
□○□=□(只)
□○□○□=□(人)
□○□○□=□(个)