5小时后甲车行了四分之三
- 时间:2020-05-16 19:48:28
- 分类:数学世界
- 阅读:143 次
甲乙两车从相距420千米的两地相对开出,5小时后甲车行了四分之三,乙车行了三分之二,求两车相距多少千米?
数学题解答:①甲车离终点还剩下:1 – 3/4 = 1/4,乙离终点还剩下:1 – 2/3 =1/3
两车距离占总路程的:1 – 1/4 – 1/3 = 5/12
两车距离:420 × 5/12 = 175(千米)
②或者这样做:3/4 + 2/3 – 1 =5/12,420 × 5/12 = 175(千米)
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