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bonjour j’ai besoin d’aide svp :

19) Calculer (détailler les calculs)
a. 1 + 2/3
b. 1 - 3/5
c. 1 - 2/7
d. 1/3 + 3/4
e. - 2/5 + 1/6
f. 9/2 - 13/7


Répondre :

Bonsoir


Calculer (détailler les calculs)


a. 1 + 2/3

= 3/3 + 2/3

= 5/3


B. 1 - 3/5

= 5/5 - 3/5

= 2/5


c. 1 - 2/7

= 7/7 - 2/7

= 5/7


D. 1/3 + 3/4

= (1 x 4)/(3 x 4) + (3 x 3)/(4 x 3)

= 4/12 + 9/12

= 13/12


e. - 2/5 + 1/6

= (-2 x 6)/(5 x 6) + (1 x 5)/(6 x 5)

= -12/30 + 5/30

= (-7/30)


f. 9/2 - 13/7

= (9 x 7)/(2 x 7) - (13 x 2)/(7 x 2)

= 63/14 - 26/14

= 37/14