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乗法
#4
89,193 ビュー

乗法 は、算術の四則演算と呼ばれるものの一つで、整数では、一方の数 に対して他方の数 の回数だけ繰り返し加えていく(これを掛けるまたは乗じるという)ことにより定義できる二項演算である。掛け算(かけざん)、乗算(じょうざん)とも呼ばれる。代数…

#5
64,375 ビュー

日本の元号一覧(にほんのげんごういちらん)は、和暦でこれまでに使用された日本の元号の一覧である。2019年5月1日以降は令和が使用されている。

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今日の出来事

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2024
Several thousand North Korean migrant workers in Helong engaged in civil unrest, including a factory occupation and the taking of managers as hostages, due to unpaid wages.
2013
French special forces failed in an attempted rescue of a DGSE agent, who had been taken hostage in 2009 by al-Shabaab, in Bulo Marer, Somalia.
2003
After Chicago police detective Jon Burge was discovered to have extracted forced confessions from more than 200 suspects, the governor of Illinois commuted the death sentences of 167 prisoners and pardoned four others.
1986
The Gateway Bridge (pictured) in Brisbane, Australia, opened as the largest prestressed-concrete, single-box bridge in the world.
1964
In a landmark report (cover pictured), U.S. surgeon general Luther Terry issued a warning that tobacco smoking may be hazardous to health, concluding that it has a causative role in lung cancer, chronic bronchitis, and other illnesses.
1961
Students at the University of Georgia rioted in an attempt to prevent the attendance of two African-American students.
1946
The People's Republic of Albania was proclaimed, with Enver Hoxha as the country's de facto head of state.
1943
Italian-American journalist and trade-union activist Carlo Tresca, a leading public opponent of the Mafia infiltration of unions, was assassinated in New York City.
1927
Louis B. Mayer, head of Metro-Goldwyn-Mayer, hosted 36 people involved in the film industry at a banquet, where he announced the creation of what would become the Academy of Motion Picture Arts and Sciences.
1923
Troops from France and Belgium invaded the Ruhr to force the Weimar Republic to pay reparations in the aftermath of World War I.

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