18&30
18=_x_x_ 30_x_x_
18&30的最小公倍數是_x_x_x_=___
42&54
42=_x_x_ 54=_x_x_x_=___
42&54的最大公因數是_x_=___
搵人幫下我,我唔知點做呀
咩係分解質因數呀,搵人幫下我啦18&30最小公倍數同42&54最大公因數又x又再x
2007-08-03 3:39 am
回答 (2)
2007-08-03 4:09 am
✔ 最佳答案
18=2x3x3 3 [_18___
3 [__6____
........ 2
30=2x3x5
2 [_30___
3 [_15___
........5
2x3x3x5=90
18= 2x3x3
30= 2x3 x5
---------------------------------
........2x3x3x5 =90
42=2x3x7
2 [_42_____
3 [_21_____
........7
54=2x3x3x3
2 [_54______
3 [_27_____
3 [__9_____
........ 3
2x3=6
42= 2x3 x7
54= 2x3x3x3
-------------------------------------
.......2x3 =6
2007-08-03 3:45 am
18=2x3x3
30=2x3x5
18&30的最小公倍數=2x3x3x5=90
42=2x3x7
54=2x3x3x3
42&54的最大公因數=2x3=6
30=2x3x5
18&30的最小公倍數=2x3x3x5=90
42=2x3x7
54=2x3x3x3
42&54的最大公因數=2x3=6
參考: me
收錄日期: 2021-04-13 00:56:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070802000051KK04856