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

Toán Lớp 6: Rút gọn biểu thức : D=4^6×9^5+6^9×120 ========== 8^4×3^12-6^11 Giúp em vói ạ

Toán Lớp 6: Rút gọn biểu thức :
D=4^6×9^5+6^9×120
——————————
8^4×3^12-6^11
Giúp em vói ạ

Comments ( 2 )

  1. $\text{#Táo vàng}$
    D = {4^{6} . 9^{5} + 6^{9} . 120}/{8^{4} . 3^{12} – 6^{11}}
    D = {(2^{2})^{6} . (3^{2})^{5} + (2.3)^{9} . 2^{3} . 3 . 5}/{(2^{3})^{4} . 3^{12} – (2.3)^{11}}
    D = {2^{12} . 3^{10} + 2^{9} . 3^{9} . 2^{3} . 3 . 5}/{2^{12} . 3^{12} – 2^{11} . 3^{11}}
    D = {2^{12} . 3^{10} + 2^{12} . 3^{10} . 5}/{2^{12} . 3^{12} – 2^{11} . 3^{11}}
    D = {2^{12} . 3^{10} . (1 + 5)}/{2^{11} . 3^{11} . (6-1)}
    D = {2^{12} . 3^{10} . 6}/{2^{11} . 3^{11} . 5}
    D = {2^{12} . 3^{10} . 2.3}/{2^{11} . 3^{11} . 5}
    D = {2^{13} . 3^{11}}/{2^{11} . 3^{11} . 5}
    D = 4/5

  2. Giải đáp:
    D=\frac{4^6 xx 9^5+6^9 xx120}{8^4 xx3^{12}-6^{11}}
      = \frac{2^{12}xx3^{10}+120xx6^9}{2^{12}xx3^{12}-6^{11}}
      = \frac{2^2 xx6^{10}+20xx6xx6^9}{6^{12}-6^{11}}
      = \frac{4xx6^{10}+20.6^{10}}{(6-1)6^{11}}
      = \frac{(4+20)6^{10}}{5xx6^{11}}
      = \frac{24xx6^{10}}{5xx6^{11}}
      = \frac{24}{5xx6}
      = 24/30
      = 4/5

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

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