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题型:单选题 题类:常考题 难易度:普通
分数和百分数及运算8346 10
÷ = ﹣ = + = 1﹣ = + =
+ = 3× = ÷ = × = 5÷ =
﹣ = 0÷ = ×0.25= 1÷3× =
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