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