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

Toán Lớp 6: Thực hiện phép tính 500-{5.[409-(2^3.3-21)^2]+10^3}:15

Toán Lớp 6: Thực hiện phép tính
500-{5.[409-(2^3.3-21)^2]+10^3}:15

Comments ( 2 )

  1. 500-{ 5. [ 409 – ( 2^3 . 3 – 21 )^2 ] + 10^3} : 15
    = 500 – {5 . [409 – ( 8 . 3 – 21 )^2 ] + 1000} : 15
    = 500 – {5 . [409 – ( 24 – 21)^2 ] + 1000} : 15
    = 500 – {5 . [409 – 3^2] + 1000} : 15
    = 500 – {5 . [409 – 9] + 1000} : 15
    = 500 – {5 . 400 + 1000} : 15
    = 500 – {2000 + 1000} : 15
    = 500 – 3000 : 15
    = 500 – 200
    = 300
    #dtkc
     

  2. 500-{5.[409-(2^3. 3-21)^2]+10^3}:15
    =500-{5.[409-(8.3-21)^2]+1000}:15
    =500-{5.[409-3^2]+1000}:15
    =500-{5.[409-9]+1000}:15
    =500-{5.400+1000}:15
    =500-3000:15
    =500-200
    =300

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