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

Toán Lớp 6: Tính a)-(-27-77-2)+78 b) 25+(-81-6-20)

Toán Lớp 6: Tính
a)-(-27-77-2)+78 b) 25+(-81-6-20)

Comments ( 2 )

  1. $\text{ a) -( -27 – 77 – 2 ) + 78 }$
    $\text{ = 27 + 77 + 2 + 78 }$
    $\text{ = ( 27 + 77 ) + ( 2 + 78 ) }$
    $\text{ = 104 + 80 }$
    $\text{ = 184 }$
    $\text{ b) 25 + ( -81 – 6 – 20 ) }$
    $\text{ = 25 – 81 – 6 – 20 }$
    $\text{ = -56 – 6 – 20 }$
    $\text{ = -62 – 20 }$
    $\text{ = -82 }$
     

  2. a)-(-27-77-2)+78
    = 106 + 78
    = 184
    b) 25+(-81-6-20)
    =25+(-107)
    =-82

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