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数学
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how many times do the hour hand and minute hand meet from 6.a.m to9:30p.m?
要答案的
人气:491 ℃ 时间:2020-05-12 12:00:25
解答
14次.上午六点半到中午十一点,每个整点之间各,相遇一次,也就是5次;中午十二点时相遇1次,十二点到一点是不相遇的;从午后一点到午后九点半之间,每整点间相遇8次.因此,相遇的次数应该是5+1+0+8=14.
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