rút gọn 2489 – 36/7467 – 108 2929 – 303/8787 + 1717 10^2.9-10^2.2/700 3^9.3^20.2^8/3^24.243.2^6 215.5^3.2^6.3^4/8.2^18 .81.5 giúp mk với

0 bình luận về “rút gọn 2489 – 36/7467 – 108 2929 – 303/8787 + 1717 10^2.9-10^2.2/700 3^9.3^20.2^8/3^24.243.2^6 215.5^3.2^6.3^4/8.2^18 .81.5 giúp mk với”

1. `a)“(2489-36)/(7467-108)`
   `=(2453)/(7359)`
   `=(2453xx1)/(2453xx3)`
   `=1/3`
   `b)“(2929-303)/(8787-1717)`
   `=(2626)/(7070)`
   `=(13xx202)/(35xx202)`
   `=13/35`

   `c)“(10^2*9-10^2*2)/700`

   `=(10^2*(9-2))/700`

   `=(100*7)/700`

   `=700/700`

   `=1`

   `d)“(3^9*3^20*2^8)/(3^24*243*2^6`

   `=(3^29*2^8)/(3^24*3^5*2^6`

   `=(3^29*2^8)/(3^29*2^6`

   `=2^2`

   `=4`

   `e)“(215*5^3*2^6*3^4)/(8*2^18 *81*5`

   `=(5*43*5^3*2^6*3^4)/(2^3*2^18 *3^4*5`

   `=(43*5^4*2^6*3^4)/(2^21 *3^4*5`

   `=(43*5^3)/(2^15 `

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2. Đáp án:

    

   Giải thích các bước giải:

   $\frac{2489-36}{7467-108}$

   =$\frac{2453}{7359}$

   =$\frac{2453}{3.2453}$

   =$\frac{1}{3}$

   $\frac{2929-303}{8787+1717}$

   =$\frac{2626}{10504}$

   =$\frac{2626}{4.2626}$  

   =$\frac{1}{4}$ 

   CHO MK XIN 5*

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