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

Toán Lớp 7: Tính hợp lý (nếu có thể) $\frac{4^10 . 9^6 + 3^12 . 8^5}{6^13 . 4- 2^16 . 3^12}$

Toán Lớp 7: Tính hợp lý (nếu có thể)
$\frac{4^10 . 9^6 + 3^12 . 8^5}{6^13 . 4- 2^16 . 3^12}$

Comments ( 1 )

  1. Lời giải và giải thích chi tiết:
     4^10.9^6+3^12.8^5/6^13.4-2^16.3^12
    =(2^2)^10.(3^2)^6+3^12.(2^3)^5/(2.3)^13.2^2-2^16.3^12
    =2^20.3^12+3^12.2^15/2^13.3^13.2^2-2^16.3^12
    =3^12.(2^20.2^15)/2^15.3^13-2^16.3^12
    =3^12.2^35/2^15.3.3^12-2^16.3^12
    =3^12.2^35/3^12.(2^15.3-2^16)
    =2^35/2^15.3-2^16
    =2^35/2^15.3-2^15.2
    =2^35/2^15.(3-2)
    =2^35/2^15
    =2^20
     

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

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