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

Toán Lớp 6: c) 4.17.25 d) 476 – {5.[409 – (8.3 – 21) 2 ] – 1724}.

Toán Lớp 6: c) 4.17.25 d) 476 – {5.[409 – (8.3 – 21) 2 ] – 1724}.

Comments ( 2 )

  1. c) 4 . 17 . 25
    = (4 . 25) . 17
    = 100 . 17
    = 1700
    d) 476 – {5. [409 – (8 . 3 – 21) . 2] – 1724}
    = 476 – {5. [409 – (24 – 21) . 2] – 1724}
    = 476 – [5 . (409 – 3 . 2) – 1724]
    = 476 – (5 . 403 – 1724)
    = 476 – (2015 – 1724)
    = 476 – 291
    = 185
    @Sú 

  2. c) 4 . 17 . 25
    = ( 4 . 25 ) . 17
    = 100 . 17
    = 1700
    d) 476 – { 5 . [409 – ( 8 . 3 – 21 ) . 2] – 1724 }
    = 476 – { 5 . [409 – ( 24 – 21 ) . 2] – 1724 }
    = 476 – { 5 . [409 – 3 . 2] – 1724 }
    = 476 – { 5 . [409 – 6] – 1724 }
    = 476 – { 5 . 403 – 1724 }
    = 476 – { 2015 – 1724 }
    = 476 – 291
    = 185

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