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

Toán Lớp 6: 2018^0 –{ 10^2 :[20.15 -2^3 .5^2 ]-25 }

Toán Lớp 6: 2018^0 –{ 10^2 :[20.15 -2^3 .5^2 ]-25 }

Comments ( 2 )

  1. 2018^0 – [ 10^2 : ( 20. 15 – 2^3. 5^2) – 25]
    = 1 – [ 100 : ( 20. 15 – 8. 25) – 25]
    = 1 – [ 100 : ( 300 – 200) – 25]
    = 1 – [ 100 : 100 – 25]
    = 1 – [ 1 – 25]
    = 1 – ( – 24)
    = 1 + 24
    = 25
     

  2. $2018^0$  – {10² : [20 . 15 – 2³ . 5²] – 25}
    =   1 – {100 : [20 . 15 – 8 . 25] – 25}
    =   1 – {100 : [300 – 200] – 25}
    =   1 – {100 :        100      – 25}
    =   1 –        {    1        – 25}
    =   1 – (-24)
    =   1 + 24
    =     25
     

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

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