Question

[ocher]

Tính (theo mẫu)

Mẫu:\(\frac{5\cdot6\cdot7\cdot9}{12\cdot7\cdot27}\)=\(\frac{5\cdot6\cdot7\cdot9}{6\cdot2\cdot7\cdot9\cdot3}\)=\(\frac{5}{6}\)

a.\(\frac{3\cdot4\cdot7}{12\cdot8\cdot9}\).............................................

b.\(\frac{4\cdot5\cdot6}{12\cdot10\cdot8}\)...........................................

c.\(\frac{5\cdot6\cdot7}{12\cdot14\cdot15}\)........................................

(Lưu ý:Dấu chấm là dấu nhân)

Answer 1

[Nguyễn Quang Tùng]

a, \(\frac{3.4.7}{12.8.9}\)= \(\frac{3.4.7}{3.4.8.9}\)= \(\frac{7}{72}\)

b, \(\frac{4.5.6}{12.10.8}\)= \(\frac{4.5.6}{3.4.2.5.8}\)= \(\frac{1}{8}\)

c, \(\frac{5.6.7}{12.14.15}\)= \(\frac{5.6.7}{2.6.2.7.3.5}\)= \(\frac{1}{12}\)