Sagot :
Réponse :
Explications étape par étape
Bonjour
-7/50 + 2/75
= (-7 x 3)/(50 x 3) + (2 x 2)/(75 x 2)
= -21/150 + 4/150
= -17/150
1/5 - 2/3
= (1 x 3)/(5 x 3) - (2 x 5)/(3 x 5)
= 3/15 - 10/15
= -7/15
1/12 - 1/9
= (1 x 3)/(12 x 3) - (1 x 4)/(9 x 4)
= 3/36 - 4/36
= -1/36
4/18 + 5/27
= (4 x 3)/(18 x 3) + (5 x 2)/(27 x 2)
= 12/54 + 10/54
= 22/54
= (2 x 11)/(2 x 27)
= 11/27
pour la c:
[tex] \frac{1}{12} - \frac{1}{9} = \frac{1 \times 3}{12 \times 3} - \frac{1 \times 4}{9 \times 4} = \frac{3}{36} - \frac{4}{36} = \frac{ - 1}{36} [/tex]