Bonjour j'ai besoin d'aide pour l'exercice 49 page 76.
Calculer et simplifier la fraction obtenue.
a)3/4 - 11/12
b) 3/4 + 11/12
c) 5/6- 7/8
mercii
Calculer et simplifier la fraction obtenue.
a)3/4 - 11/12
b) 3/4 + 11/12
c) 5/6- 7/8
mercii
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Bonsoir,
a. 3/4-11/12=9/13-11/12=-1/6
b. 3/4+11/12=9/12+11/12=5/3
c. 5/6-7/8=-1/24
Bonsoir,
Calculer et simplifier la fraction obtenue.
a)3/4 - 11/12
= (3 x 3) / (4 x 3) - 11/12
= 9/12 - 11/12
= - 2/12
= (2 x - 1) / (2 x 6)
= - 1/6.
b) 3/4 + 11/12
= 9/12 + 11/12
= 20/12
= (4 x 5) / (4 x 3)
= 5/3.
c) 5/6- 7/8
= (5 x 4) / (6 x 4) - (7 x 3) / (8 x 3)
= 20/24 - 21/24
= - 1/24.