Toán 3.5^2-16:2^3+4^2+3^2-2^4.5 ; 6.8.12^2-24.88 ; 7.8.132-28.138 chia tất cả 2^6.5^3 17/08/2021 By Julia 3.5^2-16:2^3+4^2+3^2-2^4.5 ; 6.8.12^2-24.88 ; 7.8.132-28.138 chia tất cả 2^6.5^3
`3.5^2-16:2^3+4^2+3^2-2^4. 5` `= 3.25 – 16:8 + 16 + 9 – 16.5` `= 75 – 2 + 16 + 9 – 80` `= 18` $\dfrac{6.8.12^2 – 24.88}{2^4 . 5^3}$ $= \dfrac{2^8 . 3^3 – 2^6 . 3 . 11}{2^4 . 5^3}$ $= \dfrac{2^6 . 3(4 . 9 – 11)}{2^4 . 5^3}$ $= \dfrac{4.3.25}{5^3}$ $= \dfrac{12}{5}$ $\dfrac{7.8.132 – 28 . 138}{2^6 . 5^3}$ $= \dfrac{2^5 . 3 . 7 . 11 – 2^3 . 3 . 7 . 23}{2^6 . 5^3}$ $= \dfrac{2^3 . 3 . 7 ( 4 . 11 – 23)}{2^6 . 5^3}$ $= \dfrac{3.7.21}{8.5^3}$ $= \dfrac{441}{1000}$ Trả lời
`3.5^2-16:2^3+4^2+3^2-2^4. 5`
`= 3.25 – 16:8 + 16 + 9 – 16.5`
`= 75 – 2 + 16 + 9 – 80`
`= 18`
$\dfrac{6.8.12^2 – 24.88}{2^4 . 5^3}$
$= \dfrac{2^8 . 3^3 – 2^6 . 3 . 11}{2^4 . 5^3}$
$= \dfrac{2^6 . 3(4 . 9 – 11)}{2^4 . 5^3}$
$= \dfrac{4.3.25}{5^3}$
$= \dfrac{12}{5}$
$\dfrac{7.8.132 – 28 . 138}{2^6 . 5^3}$
$= \dfrac{2^5 . 3 . 7 . 11 – 2^3 . 3 . 7 . 23}{2^6 . 5^3}$
$= \dfrac{2^3 . 3 . 7 ( 4 . 11 – 23)}{2^6 . 5^3}$
$= \dfrac{3.7.21}{8.5^3}$
$= \dfrac{441}{1000}$