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標題:

• What is the sum of the square of the first 50positive even..
• F3 maths 急~@1@
• 香港仔叫做amigo bakery (10分)@1@

• What is the sum of the square of the first 50positive even..
• F3 maths 急~@1@
• 香港仔叫做amigo bakery (10分)@1@

 

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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

發問:

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 更新: 仲有教理我點做分解質因數啦

最佳解答:

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

其他解答:

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