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

Toán Lớp 7: tính nhanh : $\frac{2x47x38+53×76}{176-29-71}$

Toán Lớp 7: tính nhanh : $\frac{2x47x38+53×76}{176-29-71}$

Comments ( 2 )

  1. (2.47.38+53.76)/(176-29-71)
    =(94.38+106.38)/(176-100)
    =(38.(94+106))/(76)
    =(38.200)/(76)
    =(38.200)/(2.38)
    =(200)/2
    =100

  2. (2 . 47 . 38 + 53 . 76)/(176 – 29 – 71)
    = (94 . 38 + 53 . 2 . 38)/(176 – (29 + 71))
    = (94 . 38 + 106 . 38)/(176 – 100)
    = ((94 + 106) . 38)/76
    = (200 . 38)/(38 . 2)
    = 200/2
    = 100

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