Réponses

2013-06-11T18:53:32+02:00

Bonsoir

 

8/5 x 75

 

= 8 x75 = 600 /5 = 120

8 x 15 = 120

1.6 x 75 = 120

 

15/8 x 9

15 x 9 = 135/8 = 16.875

15 : 8 = 1.875 x 9 = 16.875

15 : 4 = 3.75 x 4.5 = 16.875

 

13/4 x 9

= 13 x 9 = 117/4 = 29.25

= 13 : 4 = 3.25 x 9  = 29.25

= 13 x 4.5 = 58.50 : 2 = 29.25

 

7/8 x 1.6

= 7 x 1.6 = 11.2 / 8 = 1.4

7 : 8 = 0.875 x 1.6 = 1.4

7 x 0.8 = 5.6 : 4 = 1.4

 

3/4 x 16.4

= 3 x 16.4 = 49.2 / 4 = 12.3

= 3 : 4 = 0.75 x 16.4 = 12.3

= 3 x 4.1 = 12.3

 

2/5 x 0.525

= 2 x 0.525 = 1.05/5 = 0.21

= 2 : 5 = 0.4 x 0.525 = 0.21

= 2 x 0.105 = 0.21