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

Toán Lớp 7: 15|1/3 – 7/5| + 5sqrt(4/25) – sqrt(10 ^ 2 – 8 ^ 2).

Toán Lớp 7: 15|1/3 – 7/5| + 5sqrt(4/25) – sqrt(10 ^ 2 – 8 ^ 2).

Comments ( 2 )

  1. 15|1/3-7/5|+5\sqrt{(4)/(25)}-\sqrt{10^2-8^2}
    =15|(5)/(15)-(21)/(15)|+5.(2)/(5)-\sqrt{100-64}
    =15|-(16)/(15)|+2-\sqrt{36}
    =15.(16)/(15)+2-6
    =16+2-6
    =12
     

  2. Giải đáp:
     12
    Lời giải và giải thích chi tiết:
     15 |1/3-7/5| + 5\sqrt{4/25} – \sqrt{10^2-8^2}
    = 15 . |-16/15| + 5 . \sqrt{(2/5)^2} – \sqrt{100-64}
    = 15 . 16/15 + 5 . 2/5 – \sqrt{36}
    = 16 + 2 – 6
    = 12

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