试题 试卷
题型:单选题 题类:常考题 难易度:普通
分数的加法和减法(复习)7435 10
+ = + = - = + =
+ = - = - = - =
+ = + = - = + =
20×4= 33+27= 400×6 53﹣26=
14×2= = = =
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