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题型:填空题 题类:模拟题 难易度:普通
浙江省丽水、金华市2019年中考数学预测卷
(+5)☆(+14) =+19 (-13)☆(-7) =+20,
(-2)☆(+15) =-17 (+18)☆(-7) =-25,
0☆(-19) =+19 (+13)☆0 =+13.
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