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题型：填空题 题类： 难易度：困难
【小白鸥-情境卷】数学北师大三上18套大卷魅力“十四冬”第一单元综合能力提优卷
3 × 4 + 3 = 2 × 8 – 2 = 2×5 + 2 = 3 × 8 – 3 =
6 × 3 – 6 = 5 × 4 – 5 = 7 ×2 + 2 = 5 × 4 – 5 =
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