Réponses

2013-04-06T20:49:05+02:00

45 x 49 / 14 x 60 = 9 x 7 / 2 x 12 = 63 / 24 = 21/8

 

45 x 65 / 26 x 72 = 2925 / 1872 = 25/16

 

12.4  : 48 = 0.2583333..

 

0.55 x 2 = 1.1/11 = 0.1

 

2.5 x 3 / 3 x 0.5 = 7.5 / 1.5 = 5

 

5.6 x 9 = 50.4 /0.7 = 72

2013-04-06T21:10:42+02:00

a)45 x 49 / 14 x 60

= 9 x 7 / 2 x 12

= 63 / 24

= 21/8

 

b)45 x 65 / 26 x 72

= 2925 / 1872

= 25/16

 

c)12.4  : 48

= 0.2583333..

 

d)0.55 x 2 =

1.1/11

= 0.1

 

e)2.5 x 3 / 3 x 0.5

= 7.5 / 1.5

= 5

 

f)5.6 x 9 =

50.4 /0.7

= 72

 

en éspèrant t'avoir aidé:)