Question

Tính:

a) \(\dfrac{7}{2}+5\)                      b) \(9+\dfrac{12}{13}\)                      c) \(8-\dfrac{9}{11}\)                     d)  \(\dfrac{21}{5}-3\)

 

Answer 1

a: \(\dfrac{7}{2}+5=\dfrac{7}{2}+\dfrac{10}{2}=\dfrac{17}{2}\)

b: \(9+\dfrac{12}{13}=\dfrac{117}{13}+\dfrac{12}{13}=\dfrac{129}{13}\)

c: \(8-\dfrac{9}{11}=\dfrac{88}{11}-\dfrac{9}{11}=\dfrac{88-9}{11}=\dfrac{79}{11}\)

d: \(\dfrac{21}{5}-3=\dfrac{21}{5}-\dfrac{15}{5}=\dfrac{6}{5}\)