Bjr, dans chaque cas reduis les nombres au même dénominateur. a. 2/7et3/10. B. -2,3/2et3,61/5. C. 1/2;-4/5 et 7/15. D. -10,34/24et et 15,2/16. E.5/6; 1/12 et 5/24. F. 32/15; 1/20; -17/12 et 19/-6. Merci c’est pour demain !
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Bonjour,a. 2/7 = (2 x 10) / (7 x 10) = 20/70
3/10 = (3 x 7) / (10 x 7) = 21/70
B. -2,3/2 = (- 2,3 x 5) / (2 x 5) = - 11,5/10
3,61/5 = (3,6 x 2) / (5 x 2) = 7,2/10
C. 1/2 = (1 x 15) / (2 x 15) = 15/30
-4/5 = (- 4 x 6) / (5 x 6) = - 24/30
7/15 = (7 x 2) / (15 x 2) = 14/30
D. -10,34/24 = (- 10,34 x 2) / (24 x 2) = - 20,68/48
15,2/16 = (15,2 x 3) / (16 x 3) = 45,6/48
E.5/6 = (5 x 4) / (6 x 4) = 20/24
1/12 = (1 x 2) / (12 x 2) = 2/24
5/24.
F. 32/15 = (32 x 4) / (15 x 4) = 128/60
1/20 = (1 x 3) / (20 x 3) = 3/60
-17/12
19/-6 = (19 x 2) / (- 6 x 2) = 38/- 12 = - 38/12