Réponses

2014-03-14T08:33:59+01:00
a) 7/3 x 4/5 = 28/15             

b) 11/17 x 17/11 = 1 

c) 7/2 x 3/35 = 21/70 = 7 x 3 / 7 x 10 = 3/10  
              
d) 1,5/2 x 6/10 = 9/20


  • Utilisateur Brainly
2014-03-14T08:49:39+01:00
Bonjour, 

a) \frac{7}{3} X \frac{4}{5} = \frac{28}{15}           

b) \frac{11}{17}X \frac{17}{11}  =1

c)  \frac{7}{2} X \frac{3}{35}= \frac{21}{70}      

= \frac{3X7}{10X7} = \frac{3}{10}

d)  \frac{1}{2}X \frac{6}{10}  = \frac{9}{20}

Bonne journée! :)