1: ⑴ 4 5 5
⑵ 因
⑶ 因 质因
2: 15=3x5 21=3x7 25=5x5 27=3x3x3
33=3x11 35=5x7 39=3x13
3: 3 5 5 7
5 11 3 17
3 19 5 19
3 29 3 37
5 41 3 47
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1: ⑴ 4 5 5
⑵ 因
⑶ 因 质因
2: 15=3x5 21=3x7 25=5x5 27=3x3x3
33=3x11 35=5x7 39=3x13
3: 3 5 5 7
5 11 3 17
3 19 5 19
3 29 3 37
5 41 3 47
http://m.ksjqmj.com/wunianjidaan/2290.html
推荐访问