Bonsoir besoin de vôtre aide svp pour l'exercice 90 et 78 merci à vous

Réponse :

Bonjour

Explications étape par étape

78)

5/8 correspond à 30 L donc le total correspond à :

8 x 30 / 5 = 48 L

90)

2/3 < ... < 4/5

2/3 = (2 x 5)/(3 x 5) = 10/15 = 0,66...

4/5 = (4 x 3)/(5 x 3) = 12/15 = 0,8

5/11 < ... < 6/11

5/11 = 0,45...

6/11 = 0,54...

9/7 < ... < 19/14

9/7 = (9 x 2)/(7 x 2) = 18/14 = 1,28...

19/14 = 1,35...

7/3 < ... < 3

3 = (3 x 3)/(3 x 1) = 9/3

7/3 = 2,33...

3/5 < ... < 67/100

3/5 = (3 x 20)/(5 x 20) = 60/100 = 0,6

67/100 = 0,67

45 < ... < 46

0,2 < ... < 0,3

9/10 < ... < 1

9/10 = 0,9

7/2 < ... < 4

4 = (4 x 2)/(1 x 2) = 8/2

7/2 = 3,5

37/28 = 1,32... => 9/7 < 37/28 < 19/14

1/4 = 0,25 => 0,2 < 1/4 < 0,3

91/2 = 45,5 => 45 < 91/2 < 46

2/3 = 0,66.... => 3/5 < 2/3 < 67/100

3/4 = 0,75 => 2/3 < 3/4 < 4/5

5/2 = 2,5 => 7/3 < 5/2 < 3

15/4 = 3,75 => 7/2 < 15/4 < 4

8/3 = 2,66... => 7/3 < 8/3 < 3

1/2 = 0,5 => 5/11 < 1/2 < 6/11

19/20 = 0,95 => 9/10 < 19/20 < 1