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

Toán Lớp 6: Trình bày rút gọn biểu thức : 3.5.7.9.11.13.37-10101/1212120+40404 *Sao cho kết quả ra 247/62.

Toán Lớp 6: Trình bày rút gọn biểu thức : 3.5.7.9.11.13.37-10101/1212120+40404
*Sao cho kết quả ra 247/62.

Comments ( 2 )

  1. (3.5.7.9.11.13.37-10101)/(1212120+40404)
    = ((3.7. 13.37) .  9 . 5 . 11 – 10101) / (10101 . 120 + 10101 . 4)
    = (10101 . 9 . 5 . 11 – 10101) / (10101 . 120 + 10101.4)
    = (10101 . (9 . 5.11 – 1)) /(10101 . (120 + 4))
    = (10101 . 494) / (10101 . 124)
    = 494/124
    = 247/62

  2. ( 3 . 5 . 7 . 9 . 11 . 13 . 37 – 10101 )/( 1212120 + 40404 )
    = ( ( 3 . 7 . 13 . 37 ) . ( 11 . 5 . 9 ) – 10101 )/(  120 . 10101 + 4 . 10101 )
    = ( 10101 . 495 – 10101 . 1)/( 10101 . ( 120 + 4 ) )
    = ( 10101 . ( 495 – 1 ) )/( 10101 . 124 )
    = ( 10101 . 494 )/( 10101 . 124 )
    = 494/124 = 247/62
     

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