Question

Giúp mình với: 400 : {5[360-(290+ 2.5²)]}

 

 

Answer 1

\(400\div\left\{5\left[360-\left(290+2.5^2\right)\right]\right\}\)

\(=400\div\left\{5\left[360-\left(290+50\right)\right]\right\}=400\div\left[5\left(360-340\right)\right]\)

\(=400\div\left(5.20\right)=400\div100=4\)

Answer 2

                                       Bài giải

\(400\text{ : }\left[5\left\{360-\left(290+2\cdot5^2\right)\right\}\right]\)

\(=400\text{ : }\left[5\left\{360-\left(290+50\right)\right\}\right]\)

\(=400\text{ : }\left[5\left\{360-340\right\}\right]\)

\(=400\text{ : }\left[5\cdot20\right]\)

\(=400\text{ : }100\)

\(=4\)

Answer 3

\(400:\left\{5.\left[360-\left(290+2.5^2\right)\right]\right\}\)

\(=400:\left\{5.\left[360-\left(290+50\right)\right]\right\}\)

\(=400:\left\{5.\left[360-340\right]\right\}\)

\(=400:\left\{5.20\right\}=400:100=4\)