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

Toán Lớp 6: 5^4.20^4/25^5.4^5=??? giúp mk vs

Toán Lớp 6: 5^4.20^4/25^5.4^5=???
giúp mk vs

Comments ( 2 )

  1. ( 5^4 ×  20^4 )/( 25^5  × 4^5 )
    = ( 5^4 × ( 2^2 × 5 )^4 )/( (5^2)^5 × (2^2)^5 )
    = ( 5^4 × 2^8 × 5^4 )/( 5^10 × 2^10 )
    = ( 5^8 × 2^8 )/( 5^10 × 2^10 )
    = ( 1 × 1 )/( 5^2 × 2^2 )
    = 1/( 25 × 4 )
    = 1/100
    @ Rin

  2. Giải đáp:
     Lời giải và giải thích chi tiết:
     ta có 5^4.20^4 =(5.20)^4=100^4=100000000
               25^5.4^5=(25.4)^5=100^5=10000000000
    và ta có 5^4.20^4/25^5.4^5=100000000/10000000000
    hay 100^4/100^5
    =1/100

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