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

Toán Lớp 6: a 333-[(-14657)+57]-78 b -6955-33-45-(-133)

Toán Lớp 6: a 333-[(-14657)+57]-78
b -6955-33-45-(-133)

Comments ( 2 )

  1. Giải đáp:
     $a) 333-[(-14657)+57]-78$
    $= 333+14657-57-78$
    $= (333+14657)+[(-57)-78)$
    $= 14990+(-135)$
    $= 14855$
    $b) (-6955)-33-45-(-133)$
    $= (-6955)-33-45+133$
    $= (-6955)+[(-33)-45+133]$
    $= (-6955)+55$
    $= -6900$
     

  2. a)333-[(-14657)+57]-78
    = 333- (-14600) – 78
    = 333 + 14600 – 78
    = 14933 – 78
    =14855
    b)-6955-33-45-(-133)
    = -6955 – 33 – 45 + 133
    = -6955 +  (-33 + 45 + 133)
    = -6955 + 55
    = -6900

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