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题型:填空题 题类:常考题 难易度:容易
异分母分数加、减法(不含带分数) 6941
① + = ② ﹣ = ③ + = ④ ﹣ = ⑤ + =
⑥1+ = ⑦ + ﹣ = ⑧ ﹣ ⑨ + = ⑩1﹣ + =
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