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

Toán Lớp 6: 79.89 – 79. (-11) – 100.79 153.177 – 153.77 + 100. (-77

Toán Lớp 6: 79.89 – 79. (-11) – 100.79
153.177 – 153.77 + 100. (-77

Comments ( 2 )

  1. Giải đáp:
    a. 0
    b. 7 600
    Lời giải và giải thích chi tiết:
    a. 79 . 89 – 79 . ( -11 ) – 100 . 79
    = 79 . [ 89 – ( -11 ) – 100 ]
    = 79 . ( 89 + 11 – 100 )
    = 79 . 0
    = 0
    ______________________________________________________________________________________
    b. 153 . 177 – 153 . 77 + 100 . (-77)
    = 153 . ( 177 – 77 ) + 100 . ( -77 )
    = 153 . 100 + 100 . ( -77 )
    = 100 . [ 153 + ( -77 ) ]
    = 100 . 76
    = 7 600

  2. Giải đáp:
     
    79.89−79.(−11)−100.79
    =79.[89−(−11)−100]
    =79.0
    =0
    ___________________________________
    153.177−153.77+100.(−77)
    =153.[177−77]+(−7700)
    =153.100+(−7700)
    =15300+(−7700)
    =7600

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