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thereare156childreninahall.ifthereare3timesasmanyboysasgirls[]1:1172:1283:1324:141

题目详情
there are156 children in a hall.if there are 3 times as many boys as girls[ ] 1:117 2:128 3:132 4:141
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答案和解析
boys 117 男孩是女孩的3倍,一共156,男孩117,女孩39.很简单的数学题.