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

Toán Lớp 7: giúp em với ạ 14 mũ 5 phần 7 mũ 6. 8 mũ 2

Toán Lớp 7: giúp em với ạ
14 mũ 5 phần 7 mũ 6. 8 mũ 2

Comments ( 2 )

  1. $\frac{14^{5}}{7^{6}.8^{2}}$  
    = $\frac{537824}{117649.64}$ 
    = $\frac{537824}{7529536}$
    = $\frac{1}{14}$ 
    Hoặc 
    $\frac{14^{5}}{7^{6}.8^{2}}$  
    = $\frac{(2.7)^{5}}{7^{6}.(2^{3})^{2}}$  
    = $\frac{2^{5}.7^{5}}{7^{6}.2^{6}}$
    = $\frac{1.1}{7.2}$ 
    = $\frac{1}{14}$

  2. Answer
    {14^{5}}/{7^{6} . 8^{2}}
    = {(2.7)^{5}}/{7^{6} . (2^{3})^{2}}
    = {2^{5} . 7^{5}}/{7^{6} . 2^{6}}
    = {\cancel{2^{5}} . \cancel{7^{5}}}/{\cancel{7^{6}} . \cancel{2^{6}}}
    = {1 . 1}/{7 . 2}
    = 1/14

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