a) 178,9 ; 17,89 ; 1,789 ; 1,709

b) 1,71

a) \(\dfrac{21}{8}\) + \(\dfrac{7}{6}\) =\(\dfrac{91}{24}\)

b) 5 - \(\dfrac{29}{8}\) = \(\dfrac{19}{8}\)

c) \(\dfrac{9}{11}\) x \(\dfrac{22}{21}\) = \(\dfrac{6}{7}\)

d) \(\dfrac{18}{8}\) : 7 = \(\dfrac{9}{28}\)
 

a) \(\dfrac{21}{8}\) + \(\dfrac{7}{6}\) =\(\dfrac{91}{24}\)

b) 5 - \(\dfrac{29}{8}\) = \(\dfrac{19}{8}\)

c) \(\dfrac{9}{11}\) x \(\dfrac{22}{21}\) = \(\dfrac{6}{7}\)

d) \(\dfrac{18}{8}\) : 7 = \(\dfrac{9}{28}\)
 

a) \(\dfrac{21}{8}\) + \(\dfrac{7}{6}\) =\(\dfrac{91}{24}\)

b) 5 - \(\dfrac{29}{8}\) = \(\dfrac{19}{8}\)

c) \(\dfrac{9}{11}\) x \(\dfrac{22}{21}\) = \(\dfrac{6}{7}\)

d) \(\dfrac{18}{8}\) : 7 = \(\dfrac{9}{28}\)
 

a) \(\dfrac{21}{8}\) + \(\dfrac{7}{6}\) =\(\dfrac{91}{24}\)

b) 5 - \(\dfrac{29}{8}\) = \(\dfrac{19}{8}\)

c) \(\dfrac{9}{11}\) x \(\dfrac{22}{21}\) = \(\dfrac{6}{7}\)

d) \(\dfrac{18}{8}\) : 7 = \(\dfrac{9}{28}\)
 

a)5 mm=0,5cm

b) 891kg=0,891 tấn

c) 3m² 9dm² = 3,09m²

\(4\dfrac{3}{2}\)  ; \(3\dfrac{1}{2}\)