Réponse :
Explications étape par étape
Bonjour
Calculez:
a. 1/4 + 1/6
= (1 x 6)/(4 x 6) + (1 x 4)/(6 x 4)
= 6/24 + 4/24
= 10/24
= (2 x 5)/(2 x 12)
= 5/12
b. 3/4 +5/6
= (3 x 3)/(4 x 3) + (5 x 2)/(6 x 2)
= 9/12 + 10/12
= 19/12
c. 7/4 - 2/6
= (7 x 3)/(4 x 3) - (2 x 2)/(6 x 2)
= 21/12 - 4/12
= 17/12
d. -11/4 + -7/6
= (-11 x 3)/(4 x 3) - (7 x 2)/(6 x 2)
= -33/12 - 14/12
= -47/12
e.1/4 - 1/6
= (1 x 3)/(4 x 3) - (1 x 2)/(6 x 2)
= 3/12 - 2/12
= 1/12
f. 1/4 + 5/6
= (1 x 3)/(4 x 3) + (5 x 2)/(6 x 2)
= 3/12 + 10/12
= 13/12
