Question

Tính bằng cách thuận tiện :15.14.12.25.2 

Nhanh lên nhé MN, help me😭

Answer 1

\(15.14.12.25.2=15.14.\left(4.3\right).25.2\)

     \(=15.2.25.4.14.3=30.100.42\)

               \(=3000.42=126000\)

#Hok_tốt

Answer 2

\(15\cdot14\cdot12\cdot25\cdot2\)

\(=3\cdot5\cdot2\cdot7\cdot3\cdot4\cdot25\cdot2\)

\(=\left(3\cdot3\right)\cdot\left(5\cdot2\right)\cdot\left(4\cdot25\right)\cdot2\cdot7\)

\(=9\cdot10\cdot100\cdot2\cdot7\)

\(=9000\cdot2\cdot7\)

\(=18000\cdot7\)

\(=126000\)

Answer 3

\(15\cdot14\cdot12\cdot25\cdot2\)

\(=15\cdot14\cdot3\cdot4\cdot25\cdot2\)

\(=1260\cdot100\)

\(=126000\)