標題:

中一maths 10題2 急急急急

發問:

1.(-6)+(14/3)(-1/7) 2.1/5/(-1/3)+3.5 3.(-2.2)/1.1-2 4.2(-12次方)-5 5.-10+4(-52次方) 6.(-1)(4-7)+(-1) 7.(-3)-[(-4)(-3)-(-3)(4)] 8.(-3)(3)-(-2)(-5) 9.(2)(-3) --------------=(-3) (-3) 10.(-1/3+1/4)/(2.5-2.25)

最佳解答:

1. (-6) + (14/3) (-1/7) A. (-6) + (14/3) (-1/7) = -6 + (-2/3) = -6-2/3 = -20/3 2.1/5/ (-1/3) + 3.5 A. 1/5/ (-1/3) + 3.5 = -3/5+3.5 = 2.9 3. (-2.2)/1.1-2 A. (-2.2)/1.1-2 = -2-2 = -4 4.2(-12次方)-5 5.-10+4(-52次方) A. -10+4^-52 = -10 6. (-1) (4-7) + (-1) A. (-1) (4-7) + (-1) = (1) (-3)-1 = -3-1 = -4 7. (-3)-[(-4) (-3)-(-3) (4)] A. (-3)-[(-4) (-3)-(-3) (4)] = (-3)-[(12)-(-12)] = (-3)-24 = -27 8. (-3) (3)-(-2) (-5) A. (-3) (3)-(-2) (-5) = -(9)-10 = -19 9. (2) (-3) --------------= (-3) (-3) ??? 10. (-1/3+1/4)/ (2.5-2.25) A. (-1/3+1/4)/(2.5-2.25) = [(-4+3)/12]/0.25 = (-1/12)/0.25 = (-1/12)/(1/4) = (-1/12)*4 = -1/3 2010-03-14 23:14:23 補充： Q.9 is strange... 2 = -3???

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