Bonjour pouvez vous me faire les exercices 15 16 et 17 svp

Bonjour,

Exercice 15 :

a) [tex]\frac{7}{11} = \frac{2*7}{2*11} =\frac{14}{22}[/tex]

b) [tex]\frac{12}{5} = \frac{6*12}{6*5} =\frac{72}{30}[/tex]

c) [tex]\frac{81}{63} = \frac{9*9}{9*7} =\frac{9}{7}[/tex]

d) [tex]\frac{65}{10} =\frac{5*13}{5*2} =\frac{13}{2}[/tex]

Exercice 16 :

a) [tex]\frac{32}{36} =\frac{4*8}{4*9} =\frac{8}{9}[/tex]

b) [tex]\frac{70}{77} =\frac{7*10}{7*11} =\frac{10}{11}[/tex]

c) [tex]\frac{36}{42} = \frac{6*6}{6*7} =\frac{6}{7}[/tex]

d) [tex]\frac{81}{72} =\frac{9*9}{9*8}=\frac{9}{8}[/tex]

Exercice 17 :

a) [tex]\frac{15}{32} =\frac{2*15}{2*32} =\frac{30}{64}[/tex]

b) [tex]\frac{6}{7} =\frac{9*6}{9*7}=\frac{54}{63}[/tex]

c) [tex]\frac{11}{14} =\frac{3*11}{3*14}=\frac{33}{42}[/tex]

d) [tex]\frac{8}{11} =\frac{6*8}{6*11} =\frac{48}{66}[/tex]

Bonjour,

Exo 15 :

a) 7/11

= 2 x 7 / 2 x 11

=14 / 22

b) 12 / 5

= 6 x 12 / 6 x 5

=72 / 30

c) 81 / 63

=  9 x 9 / 9 x 7

=9 / 7

d) 65 / 10

= 5 x 13 / 5 x 2

= 13 / 2

Exo 16 :

a) 32 / 36

=  4 x 8 / 4 x 9

= 8 / 9

b) 70 / 77

= 7 x 10 / 7 x 11

= 10 / 11

c) 36 / 42

= 6 x 6 / 6 x 7

= 6 / 7

d) 81 / 72

= 9 x 9 / 9 x 8

= 9 / 8

Exo 17 :

a) 15 / 32

= 2 x 15 / 2 x 32

= 30 / 64

b) 6 / 7

= 9 x 6 / 9 x 7

= 54 / 63

c) 11 / 14

= 3 x 11 / 3 x 14

= 33 / 42

d) 8 / 11

= 6 x 8 / 6 x 11

= 48 / 66

Voilà Bon Courage :))