Question

Thực hiện phép tính

Answer 1

`@` `\text {Ans}`

`\downarrow`

`30 \div { 12*5^2 - 2*[567 - (2*7^2 + 8^2*5)]}`

`= 30 \div {300 - 2*[567 -(98 + 320)]} `

`= 30 \div [300 - 2*(567 - 418)]`

`= 30 \div (300 - 2*149)`

`= 30 \div (300 - 298)`

`= 30 \div 2`

`= 15`

Answer 2

\(30:\left\{12\cdot5^2-2\cdot\left[567-\left(2\cdot7^2+8^2\cdot5\right)\right]\right\}\)

\(=30:\left\{12\cdot5^2-2\cdot\left[567-\left(98+320\right)\right]\right\}\)

\(=30:\left[300-2\cdot\left(567-418\right)\right]\)

\(=30:\left(300-2\cdot158\right)\)

\(=30:\left(300-316\right)\)

\(=30:-16\)

\(=-\dfrac{15}{8}\)