Bonjour à tous! Je suis en 4ème et j’aimerais que quelqu’un m’aide à mon exo de maths svpppp? Merci beaucoup d’avance! Bonne après-midi au revoir!

Bonjour,

A=

3+ 6/15 -3/5

= 45/15+6/15 - 9/15

= 42/15 = 14/5

B=

3/2* -15/3

= -45/6 = -15/3 = -5

C=

4 - 48/168

= 672/168 -48/168

= 624/168 = 156 /42 = 78/21 = 26/ 14 =13/7

D=

(3/15 - 10/15) / ( -7/3)

= -7/15 * -3/7

= 21/ 105 = 3/ 15

E=

3+1/3 = 9/3 + 1/3 = 10/3

3/4 + 1/3 = 9/12 + 4/12 = 13/12

-> 10/3 * 12/13

=120/ 360 = 12/36 = 3/9 = 1/3

F=

2/3 -1/4 = 8/12 -3/12 = 5/12

2/3 +1/4 = 8/12 + 3/12  = 11/12

->  5/12 * 12/11

= 5/11

Bonjour,

A= 3+ 6/15 -3/5

= 45/15+6/15 - 9/15

= 42/15 = 14/5

B= 3/2* -15/3

= -45/6 = -15/3 = -5

C= 4 - 48/168

= 672/168 -48/168

= 624/168 = 156 /42 = 78/21 = 26/ 14 =13/7

D= (3/15 - 10/15) / ( -7/3)

= -7/15 * -3/7

= 21/ 105 = 3/ 15

E= 3+1/3 = 9/3 + 1/3 = 10/3

=3/4 + 1/3 = 9/12 + 4/12 = 13/12

=-> 10/3 * 12/13

=120/ 360 = 12/36 = 3/9 = 1/3

F= 2/3 -1/4 = 8/12 -3/12 = 5/12

2/3 +1/4 = 8/12 + 3/12  = 11/12

->  5/12 * 12/11

= 5/11

J'espere avoirs repondue a ta question bon week-end !!

:)