二道负数除法,(1/3-3/5-3/10)÷(-7/30) (1/2-1/3)÷4÷(-1/4)

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二道负数除法,(1/3-3/5-3/10)÷(-7/30) (1/2-1/3)÷4÷(-1/4)

二道负数除法,(1/3-3/5-3/10)÷(-7/30) (1/2-1/3)÷4÷(-1/4)
二道负数除法,(1/3-3/5-3/10)÷(-7/30) (1/2-1/3)÷4÷(-1/4)

二道负数除法,(1/3-3/5-3/10)÷(-7/30) (1/2-1/3)÷4÷(-1/4)
(1/3-3/5-3/10)÷(-7/30)
=(10/30-18/30-9/30)*(30/-7)
=(-17/30)*(30/-7)
=17/7
(1/2-1/3)÷4÷(-1/4)
=1/6*1/4*(-4)
=-1/6

(-8/81)/(8/8-8/81+8/8-8/8) =(-8/81)/(8/8+8/8-8/8-(-8/81)/(8/8-8/81+8/8-8/8) -8 8 8 8 8 =—————÷

1: 19/7
过程:
1/3-3/5-3/10 = -19/30
-19/30 ÷ (-7/30) = -19/30 x (-30/7) = 19/7
2: -1/6
过程与上类似

(1/3-3/5-3/10)÷(-7/30)
=(1/3-3/5-3/10)÷(-30/7)
=-1/3*30/7+3/5*30/7+3/10*30/7
=-10/7+18/7+9/7
=17/7
(1/2-1/3)÷4÷(-1/4)
=(1/2-1/3)÷[4*(-1/4)]
=1/6*(-1)
=-1/6

1 和-1/6