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三、按比例分配和混合比例同题(1)按比例分配问题将一总量(数)按一定比例分成几个部份量(数)的应用题叫“按比例分配问题”,也称“配分比例问题”。1.甲乙丙三工人在相同时间里共生产零件94盒,每盒50个。每生产一个零件甲要3分钟,乙要4分钟,丙要5分钟。这段时间里他们各生产了多少个零件?分析:已知三人生产总量是50×94=4700(个)。当三人生产同样数量的零件时,其工效比是时间比的反比,而同时间里三人生产数量的比等于其工效比,所以甲乙丙三人生产数量的比是 1/3:1/4:1/5=20:15:12.由此可得总份数为20+15+12=47,甲乙丙三人生产数分别占
Third, the proportion of the distribution and the proportion of the same problem (1) the proportion of the allocation of a total amount (number) according to a certain percentage is divided into several parts of the amount of the application of the title “distribution problem”, also known as “ Partition ratio problem. ” 1. A, B and C workers in the same time produced a total of 94 parts box, box 50. Each production of a part of a to 3 minutes, B to 4 minutes, C to 5 minutes. How many parts did each produce during this period? Analysis: The total production of three people is known to be 50 × 94 = 4700 units. When three people produce the same number of parts, its work efficiency ratio is inversely proportional to the time ratio, and in the same time the three production quantity ratio is equal to its work efficiency ratio, so A, B and C, the production quantity ratio is 1/3: 4: 1/5 = 20: 15: 12. The total number of available copies is 20 + 15 + 12 = 47,