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

Toán Lớp 6: 1: 5[(85-35:7):8+90]-50 2: 2.[(7-3^3:3^2) : 2^2 + 99]-100

Toán Lớp 6: 1: 5[(85-35:7):8+90]-50
2: 2.[(7-3^3:3^2) : 2^2 + 99]-100

Comments ( 2 )

  1. Answer
    1)
    5 . [(85 – 35 : 7) : 8 + 90] – 50
    = 5 . [(85 – 5) : 8 + 90] – 50
    = 5 . [80 : 8 + 90] – 50
    = 5 . [10+ 90] – 50
    = 5 . 100 – 50
    = 500 – 50
    = 450
    ______________________
    2)
    2 . [(7 – 3^{3} : 3^{2}) : 2^{2} + 99] – 100
    = 2 . [(7 – 3^{1}) : 4 + 99] – 100
    = 2 . [(7 – 3) : 4 + 99] – 100
    = 2 . [4 : 4 + 99] – 100
    = 2 . [1 + 99] – 100
    = 2 . 100 – 100
    = 200 – 100
    = 100

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

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