Question

thực hiện phép tính một cách hợp lí 

36:{180:[2.5^2-(5^3-3.5.7)]}

Answer 1

\(36:\left\{180:\left[2\cdot5^2-\left(5^3-3\cdot5\cdot7\right)\right]\right\}\)

\(=36:\left\{180:\left[2\cdot25-\left(125-15\cdot7\right)\right]\right\}\)

\(=36:\left\{180:\left[50-\left(125-105\right)\right]\right\}\)

\(=36:\left[180:\left(50-20\right)\right]\)

\(=36:\left(180:30\right)\)

\(=36:6\)

\(=6\)

Answer 2

\(=\dfrac{36}{180:\left[2\cdot25-5^3+15\cdot7\right]}=\dfrac{36}{180:30}=\dfrac{36}{6}=6\)