Question

Tính nhanh :

57 * 25 + 57 : \(\frac{1}{35}\)+ 114 * 20

Answer 1

\(57\cdot25+57:\frac{1}{35}+114\cdot20\)

\(=57\cdot25+57\cdot35+2\cdot57\cdot20\)

\(=57\cdot\left(25+35+2\cdot20\right)\)

\(=57\cdot\left(25+35+40\right)\)

\(=57\cdot100\)

\(=5700\)

Answer 2

\(=57.25+57.35+57.2.20\)

\(=57.\left(25+35+60\right)\)

\(=57.100=5700\)