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

Toán Lớp 6: thực hiện phép tính a) 32.4 + 210: 28 – 2.10 b) 87.15 +15.13

Toán Lớp 6: thực hiện phép tính
a) 32.4 + 210: 28 – 2.10
b) 87.15 +15.13

Comments ( 2 )

  1. a) 32 . 4 + 210 : 28 – 2 . 10
    = 128 + 15/2 – 20
    = 271/2 – 20
    = 231/2
    b) 87 . 15 + 15 . 13
    = (87 + 13) . 15
    = 100 . 15
    = 1500

  2. a)32.4+210:28-2.10
    =128+7,5-20
    =135,5-20
    =115,5
    b) 87.15 +15.13
    =(87+13).15
    =100.15
    =1500
     

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

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