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①3+4 ②4-2 ③8-1 ④5+3
= (个)
□〇□=□(颗)
□+□=□ □+□=□
□-□=□ □-□=□
8-□=□
8-54 65 =1 3+610
2+79 9-43 52=7
9-62 40=4 4+28
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