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

Toán Lớp 6: |30|-|-17| 13+|-39| 123+(-123)

Toán Lớp 6: |30|-|-17|
13+|-39|
123+(-123)

Comments ( 2 )

  1. |30|-|-17|
    =30-17
    =13
    ——
    13+|-39|
    =13+39
    =52
    ———-
    123+(123)
    =123-123
    =0
    Giải thích :
    |+-x|=x
    -|x|=-x

  2. |30| – |-17|
    = 30 – 17
    = 13
    _______________
    13 + |-39|
    = 13 + 39
    = 52
    _______________
    123 + (-123)
    = 123 – 123
    = 0
     

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

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