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

Toán Lớp 7: (-3/7+ 5/11).-5/3+ (-4/7+6/11). -5/3

Toán Lớp 7: (-3/7+ 5/11).-5/3+ (-4/7+6/11). -5/3

Comments ( 2 )

  1. (-3/7+ 5/11).-5/3+ (-4/7+6/11). -5/3
    = (-3/7 + 5/11 + -4/7 + 6/11) . -5/3
    = {(-3/7 + -4/7) + (5/11 + 6/11)} . -5/3
    = {-1 + 1} . -5/3
    = 0 . -5/3
    = 0

  2. (-3/7 +5/11).-5.3+(-4/7+6/11).-5/3
    ={[(-3/7)+-4/7)]+(5/11+6/11)}.5/3
    ={[(-1)+1]}.-5/3
    =0.-5/3
    =0
     

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

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