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

Toán Lớp 6: $5^{3}$ . 66 + $5^{4}$ . 7 – $5^{3}$

Toán Lớp 6: $5^{3}$ . 66 + $5^{4}$ . 7 – $5^{3}$

Comments ( 2 )

  1. 5^3 . 66 + 5^4 . 7 – 5^3
    = 5^3 . 66 + 5^3 . 5 . 7 – 5^3
    = 5^3 . 66 + 5^3  . ( 5 . 7) – 5^3
    = 5^3 . 66 + 5^3 . 35 – 5^3 . 1
    = 5^3 . ( 66 + 35 – 1)
    = 5^3 . 100
    = 125 . 100
    = 12500
    #caty09

  2.    $5^{3}$.66+$5^{4}$.7-$5^{3}$
    = $5^{3}$.66+$5^{3}$.5.7-$5^{3}$
    = $5^{3}$.66+$5^{3}$.35-$5^{3}$
    = $5^{3}$.(66+35-1)
    = $5^{3}$.100
    = 125.100
    = 12 500

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

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