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

Toán Lớp 6: a,24.83+24.18+24.18-100 b,107-{38+[7.3²-24:6+(9-7)³]} :15 giải giúp em mn

Toán Lớp 6: a,24.83+24.18+24.18-100
b,107-{38+[7.3²-24:6+(9-7)³]} :15
giải giúp em mn

Comments ( 2 )

  1. a) 24 . 83 + 24 . 18 + 24 . 18 – 100
    => 24 . (83 + 18 + 18) – 100
    => 24 . 119 – 100
    => 2856 – 100
    = 2756
    b) 107 – { 38 + [7 . 3^{2} – 24 : 6 + (9 – 7)^{3}]} : 15
    => 107 – { 38 + [7 . 9 – 24 : 6 + 2^{3}]} : 15
    => 107 – { 38 + [63 – 4 + 8]} : 15
    => 107 – { 38 + 67 } : 15
    => 107 – 105 : 15
    => 107 – 7
    = 100

  2. a) 24 . 83 + 24 . 18 + 24 . 18 – 100
    = 24(83 + 18 + 18) – 100
    = 24 . 119 – 100
    = 2856 – 100
    = 2756
    $\\$
    b) 107 – {38 + [7 . 3^2 – 24 : 6 + (9 – 7)^3]}
    = 107 – [38 + (7 . 9 – 4 + 2^3)]
    = 107 – [38 + (63 – 4 + 8)]
    = 107 – (38 + 67)
    = 107 – 105
    = 102
    $#Ling$
     

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