Question

Tính nhanh :  \(S=\frac{8.2+2.14+2.90+2.6+2.12}{2.3.4+2.8+2.79+2.11}\)

Answer 1

\(S=\frac{8.2+2.14+2.90+2.6+2.12}{2.3.4+2.8+2.79+2.11}\)

     \(=\frac{2\left(8+14+90+6+12\right)}{2\left(3.4+8+79+11\right)}\)

     \(=\frac{130}{110}\)

     \(=\frac{13}{11}\)

Answer 2

\(S=\frac{2\cdot\left(8+14+90+6+12\right)}{2.\left(3.4+8+79+11\right)}=\frac{2.130}{2.110}=\frac{130}{110}=\frac{13}{11}\)

Nếu đúng cho L ike nhé !

Answer 3

\(S=\frac{2\left(8+14+90+6+12\right)}{2\cdot\left(3.4+8+79+11\right)}=\frac{130}{110}=\frac{13}{11}\)