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用反比例解. 一塊磚的面積×磚的塊數=房間面積(一定) 設如果用邊長5分米的方磚鋪地,需要x塊 5×5×x=4×4×500 x=4×4×500÷(5×5) x=320 答:如果用邊長5分米的方磚鋪地,需要320塊
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