標題:

中學正負數問題~~急

發問:

/=分線,/後=分母,-1=分子是負數-1/2 + -1/3=-1/6 + 3/4=-2又1/4 + 1又1/6=2/5 - 1/2= -1/3 - -5/6=-3/8 - 5/12=2/3 x -15/16 x -12=-4 x -3 x 10/-15 x -8=-26 x-14 x9/ 21 x-13 x-6=-12 x-8 x15/30 x-36=-3/4 + -2/5 x 15/16=2/5 除 4/15 - -5/6=1-(1/3 - 1/-4) 除 (-1/2 - 1/5)=有step,... 顯示更多 /=分線,/後=分母,-1=分子是負數 -1/2 + -1/3= -1/6 + 3/4= -2又1/4 + 1又1/6= 2/5 - 1/2= -1/3 - -5/6= -3/8 - 5/12= 2/3 x -15/16 x -12= -4 x -3 x 10/-15 x -8= -26 x-14 x9/ 21 x-13 x-6= -12 x-8 x15/30 x-36= -3/4 + -2/5 x 15/16= 2/5 除 4/15 - -5/6= 1-(1/3 - 1/-4) 除 (-1/2 - 1/5)= 有step, thx!!!!!!!!! 更新: 唔好意思,仲有2條 -1/3 - -5/6 2/3 x -15/16 x -12

最佳解答:

• quadratic equation_1@1@
• photoelectric
• 296c九巴資料~~~20點

• quadratic equation_1@1@
• photoelectric
• 296c九巴資料~~~20點

 

此文章來自奇摩知識+如有不便請留言告知

-1/2 + -1/3 = -3/6 - 2/6 = -5/6 -1/6 + 3/4 = -2/12 + 9/12 = 7/12 -2又1/4 + 1又1/6 = -2 -1/4 + 1 + 1/6 = -1 - 3/12 + 2/12 = -1 - 1/12 = -1又1/12 2/5 - 1/2 = 4/10 - 5/10 = -1/10 -1/3 - -5/6 = -2/6 + 5/6 = 3/6 = 1/2 -3/8 - 5/12 = -9/24 - 10/24 = -19/24 2/3 x -15/16 x -12 = 2/3 x 15/16 x 12 = 1 x 5/8 x 12 = 5/2 x 3 = 15/2 -4 x -3 x 10/-15 x -8 = 4 x 3 x 10/15 x 8 = 4 x 3 x 2/3 x 8 = 4 x 2 x 8 = 64 -26 x-14 x9/ 21 x-13 x-6 = 26 x 14 x 9/21 x 13 x 6 = 26 x 14 x 3/7 x 13 x 6 = 26 x 2 x 3 x 13 x 6 = 26 x 13 x 36 = 12168 -12 x-8 x15/30 x-36 = -12 x 8 x 15/30 x 36 = - 12 x 8 x 1/2 x 36 = -12 x 4 x 36 = -48 x 36 = -1728 -3/4 + -2/5 x 15/16 = -3/4 - 2/5 x 15/16 = -3/4 - 1 x 3/8 = -6/8 - 3/8 = -9/8 = -1又1/8 2/5 除 4/15 - -5/6 = 2/5 x 15/4 + 5/6 = 1 x 3/2 + 5/6 = 9/6 + 5/6 = 14/6 = 7/3 = 2又1/3 1-(1/3 - 1/-4) 除 (-1/2 - 1/5) = 1 - (1/3 + 1/4)/(-1/2 - 1/5) = 1 - (4/12 + 3/12)/-(5/10 + 2/10) = 1 + (7/12)x(10/7) = 1 + 5/6 = 1又5/6 2010-08-19 22:07:35 補充： -1/3 - -5/6 = - 1/3 + 5/6 = -2/6 + 5/6 = 3/6 = 1/2 2/3 x -15/16 x -12 = 2/3 x 15/16 x 12 = 1 x 5/8 x 12 = 5/2 x 3 = 15/2

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