1~20中,質(zhì)數(shù)有2,3,5,7,11,13,17,192,3,5,7,11,13,17,19,合數(shù)有4,6,8,9,10,12,14,15,16,18,204,6,8,9,10,12,14,15,16,18,20.
【考點(diǎn)】合數(shù)與質(zhì)數(shù)的初步認(rèn)識.
【答案】2,3,5,7,11,13,17,19;4,6,8,9,10,12,14,15,16,18,20
【解答】
【點(diǎn)評】
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發(fā)布:2024/5/27 14:0:0組卷:22引用:9難度:0.9