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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) 6937
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x={#blank#}1{#/blank#}
+ = - = - =
1- = + = + =
- = - =
﹣ = ﹣ = + = + =
﹣ = + = 2﹣ = + =
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