19-2=17
所以它們的和是:2+19=21
兩個(gè)質(zhì)數(shù)的和是一個(gè)奇數(shù),切這兩個(gè)數(shù)相差17,這兩個(gè)數(shù)的和是多少?
兩個(gè)質(zhì)數(shù)的和是一個(gè)奇數(shù),切這兩個(gè)數(shù)相差17,這兩個(gè)數(shù)的和是多少?
數(shù)學(xué)人氣:728 ℃時(shí)間:2020-04-23 15:48:22
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