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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: 5/3 : -6/7 , 6/7 :(-12) , -4/7/3 ,-5/13:5 , 25:-5/12 ,21:3/10 -4/5 , -9/10 : -7/20.Giups với

Toán Lớp 6: 5/3 : -6/7 , 6/7 :(-12) , -4/7/3 ,-5/13:5 , 25:-5/12 ,21:3/10
-4/5 , -9/10 : -7/20.Giups với

Comments ( 1 )

  1. 5/3 : (-6)/7 = 5/3 . (-7)/6 = (5 . -7)/(3 . 6) = (-35)/16
    – – – – –
    6/7 : (-12) = 6/7 . (-1)/12 = (6 . -1)/(7 . 12) = (-1)/14
    – – – – –
    -4/(7/3) = (-4 . 3)/7 = (-12)/7
    – – – – –
    (-5)/13 : 5 = (-5)/13 . 1/5 = (-5 . 1)/(13 . 5) = (-1)/13
    – – – – –
    25 : (-5)/12 = 25 . (-12)/5 = (25 . -12)/5 = (-60) 
    – – – – – 
    21 : 3/10 = 21 . 10/3 = (21 . 10)/3 = 70
    – – – – – 
    (-9)/10 : (-7)/20 = -9/10 . (-20)/7 = (-9 . -20)/(20 . 10) = 18/7 

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222-9+11+12:2*14+14 = ? ( )