how many times do the hour hand and minute hand meet from 6.a.m to9:30p.m?
how many times do the hour hand and minute hand meet from 6.a.m to9:30p.m?
要答案的
要答案的
數(shù)學(xué)人氣：542 ℃時(shí)間：2020-05-12 12:00:25
優(yōu)質(zhì)解答
14次.上午六點(diǎn)半到中午十一點(diǎn),每個(gè)整點(diǎn)之間各,相遇一次,也就是5次；中午十二點(diǎn)時(shí)相遇1次,十二點(diǎn)到一點(diǎn)是不相遇的；從午后一點(diǎn)到午后九點(diǎn)半之間,每整點(diǎn)間相遇8次.因此,相遇的次數(shù)應(yīng)該是5+1+0+8=14.
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