Question

[qtrang đangiu1tg]

100:{2.[ 30-(12+7)]}  
giúp v ạa=)

Answer 1

[HT.Phong (9A5)]

\(100:\left\{2\cdot\left[30-\left(12+7\right)\right]\right\}\)

\(=100:\left[2\cdot\left(30-19\right)\right]\)

\(=100:\left(2\cdot11\right)\)

\(=100:22\)

\(=\dfrac{100}{22}\)

\(=\dfrac{50}{11}\)