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

Toán Lớp 7: a) 2028-{[39-( 2 mũ 3. 3- 21 mũ 2)]:3+2017 mũ 0}

Toán Lớp 7: a) 2028-{[39-( 2 mũ 3. 3- 21 mũ 2)]:3+2017 mũ 0}

Comments ( 2 )

  1. $\\$
    2028 – {[39 – (2^3 . 3 – 21^2)] : 3 + 2017^0}
    = 2028 – {[39 – (8 . 3 – 441)] : 3 + 1}
    = 2028 – {[39 – (24 – 441)] : 3 + 1}
    = 2028 – {[39 – (-417)] : 3 + 1}
    = 2028 – {456 : 3 + 1}
    = 2028 – {152 + 1}
    = 2028 – 153
    = 1875
     

  2. a)
    2028 – {[39 – (2^3 . 3 – 21^2)] : 3 + 2017^0}
    = 2028 – {[39 – (24 – 441)] : 3 + 1}
    = 2028 – [39 – (-417) : 3 + 1]
    = 2028 – [456 : 3 + 1]
    = 2028 – (152 + 1)
    = 2028 – 153
    = 1875

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