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

Toán Lớp 7: |-5|.7^4+7^3.25/7^5.125-7^3.50

Toán Lớp 7: |-5|.7^4+7^3.25/7^5.125-7^3.50

Comments ( 1 )

  1. Lời giải và giải thích chi tiết:
    (|-5| . 7^4 + 7^3 . 25)/(7^5 . 125 – 7^3 . 50)
    = (5 . 7^4 + 7^3 . 5^2)/(7^5 . 5^3 – 7^3 . 50)
    = (7^3 . 5 . (7 + 5))/(7^3 . 5 . (7^2 . 5^2 – 10))
    = (7^3 . 5 . 12)/(7^3 . 5 . (1225 – 10))
    = 12/1215
    = 4/405

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