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

Question

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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Samantha 1 tuần 2021-12-07T18:28:40+00:00 2 Answers 2 views 0

Answers ( )

    0
    2021-12-07T18:29:40+00:00

    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

    0
    2021-12-07T18:30:05+00:00

    `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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