四年級_數學_周界遊戲
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正方形的邊長是18cm,它的周界是_____cm。
72
長方形的長是4cm,它的闊是3cm,它的周界是____cm。
14
長方形草地闊6米,它的長是闊的3倍,草地的周界是_____米。
48
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