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

Toán Lớp 6: 500-{5[409 – (2^3.3-21)^2]- 1724}

Toán Lớp 6: 500-{5[409 – (2^3.3-21)^2]- 1724}

Comments ( 2 )

  1. Giải đáp:
    500 – {5 . [409 – (2³ – 21)²] – 1724}
    = 500 – {5 . [409 – (8 – 21)²] – 1724}
    = 500 – {5 . [409 – (-13)²] – 1724}
    = 500 – [5. (409 – 169) – 1724]
    = 500 – (5 . 240 – 1724)
    = 500 – (1200 – 1724)
    = 500 – (- 524) = 500 + 524 = 1024
     
     

  2. Giải đáp + Lời giải và giải thích chi tiết:
    500 – {5[409-(2^3 .3-21)^2]-1724}
    = 500 – {5[409-(8.3-21)^2]-1724}
    = 500 – {5[409-(24-21)^2]-1724}
    = 500 – {5[409-(3)^2]-1724}
    = 500 – {5[409-9]-1724}
    = 500 – {5.400-1724}
    = 500 – {2000-1724}
    = 500 – 276
    = 224
     

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