试卷更新日期:2020-12-05 类型:同步测试
2.1÷0.28=÷28 36.4÷0.004= ÷4
2.1÷2.8 = ÷28 36.4÷0.04=÷4
21 ÷2.8 = ÷28 36.4÷0.4=÷4
21÷0.28 =÷28 3.64÷0.4=÷4
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