a, (1/2)^7 : (1/2)^3 b, 3/7 +(-5/2)+(-3?5 c. 2^4 :2^6/2^10 d, 3,5 . (-0,25).4 Làm giúp mình với

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1. a, ($\frac{1}{2}$)$^{7}$ : ($\frac{1}{2}$)$^{3}$ = ($\frac{1}{2}$)$^{7 – 3}$ = ($\frac{1}{2}$)$^{4}$

   b, $\frac{3}{7}$ + ($\frac{-5}{2}$) + ($\frac{-3}{5}$) = $\frac{-29}{14}$ + ($\frac{-3}{5}$) = $\frac{-187}{70}$ 

   c, $2^{4}$ : $\frac{2^{6}}{2^{10}}$ = $2^{4}$ : $2^{(-4)}$ = 256

   d, 3,5 . (-0,25) . 4 = 3,5 . (-1) = -3,5

   # Here you are

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2. `a, (1/2)^7 : (1/2)^3 `

   `=(1/2)^4`

   `b,3/7+(-5/2)+(-3/5)`

   `=30/70+(-175/70)+(-42/70)`

   `=-145/70+(-42/70)`

   `=-187/70`

   `c. 2^4 :2^6/2^10 `

   `=2^4: 1/2^4`

   `=2^4 . 2^4/1`

   `=1`

   `d, 3,5 . (-0,25).4`

   `=3,5. -1`

   `=-3,5`

    

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