Bonjour,
Rappel de cours : Pour additionner deux fractions, il faut que les dénominateurs soient identiques.
a. 4 - 2/7 = (4 × 7)/7 - 2/7 = 28/7 - 2/7 = 26/7
b. 5 + 9/4 = (5 × 4)/4 + 9/4 = 20/4 + 9/4 = 29/4
c. 19/3 - 5 = 19/3 - (5 × 3)/3 = 19/3 - 15/3 = 4/3
d. 3 - 1/3 = (3 × 3)/3 - 1/3 = 9/3 - 1/3 = 8/3
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Bonjour,
Rappel de cours : Pour additionner deux fractions, il faut que les dénominateurs soient identiques.
a. 4 - 2/7 = (4 × 7)/7 - 2/7 = 28/7 - 2/7 = 26/7
b. 5 + 9/4 = (5 × 4)/4 + 9/4 = 20/4 + 9/4 = 29/4
c. 19/3 - 5 = 19/3 - (5 × 3)/3 = 19/3 - 15/3 = 4/3
d. 3 - 1/3 = (3 × 3)/3 - 1/3 = 9/3 - 1/3 = 8/3