Question

quy đồng mẫu số các phân số dưới đây

5/8 ;  144/28  ; 1212/1515 

 

Answer 1

Ta có: \(\dfrac{144}{28}=\dfrac{36}{7};\dfrac{1212}{1515}=\dfrac{4}{5}\)

MSC: 280

\(\dfrac{5}{8}=\dfrac{5\times35}{8\times35}=\dfrac{175}{280}\)

\(\dfrac{36}{7}=\dfrac{36\times40}{7\times40}=\dfrac{1440}{280}\)

\(\dfrac{4}{5}=\dfrac{4\times56}{5\times56}=\dfrac{224}{280}\)

Answer 2

Ta có: [Math Processing Error]14428=367;12121515=45

MSC: 280

[Math Processing Error]58=5×358×35=175280

[Math Processing Error]367=36×407×40=1440280

[Math Processing Error]