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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) 6929
4÷6={#blank#}1{#/blank#}
={#blank#}2{#/blank#}
- = + = - =
+ = + = - =
=
问:哪几块的和等于 ?{#blank#}1{#/blank#}(填序号)
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