Question

tính nhanh: (1.5.6.2.10.12) : (1.3.5.2.6.10) 

CÁC BẠN NHANH LÊN NHÉ MIK CẦN GẤP.

Answer 1

\(\dfrac{1\cdot5\cdot6\cdot2\cdot10\cdot12}{1\cdot3\cdot5\cdot2\cdot6\cdot10}\)

\(=\dfrac{1\cdot30\cdot20\cdot12}{1\cdot30\cdot20\cdot3}=\dfrac{12}{3}=4\)

Answer 2

Answer 3