Question

a) -2/9 - 5/12      b) 2,25 - (-6/25)       c) 5/12 - (-7/6)   

Giúp mình với 

Answer 1

a) \(-\dfrac{2}{9}-\dfrac{5}{12}\)

\(=-\dfrac{8}{36}-\dfrac{15}{36}\)

\(=-\dfrac{23}{36}\)

b) \(2,25-\left(-\dfrac{6}{25}\right)\)

\(=2,25+\dfrac{6}{25}\)

\(=2,49\)

c) \(\dfrac{5}{12}-\left(-\dfrac{7}{6}\right)\)

\(=\dfrac{5}{12}+\dfrac{14}{12}\)

\(=\dfrac{19}{12}\)

Answer 2

a) \(\dfrac{-2}{9}-\dfrac{5}{12}=\dfrac{-8}{36}-\dfrac{15}{36}=\dfrac{-23}{36}\)

b) \(2,25-\left(-\dfrac{6}{25}\right)=2,25+\dfrac{6}{25}=\dfrac{225}{100}+\dfrac{6}{25}=\dfrac{225}{100}+\dfrac{24}{100}=\dfrac{249}{100}\)

c) \(\dfrac{5}{12}-\left(-\dfrac{7}{6}\right)=\dfrac{5}{12}+\dfrac{7}{6}=\dfrac{5}{12}+\dfrac{14}{12}=\dfrac{19}{12}\)

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