Réponses

2014-04-17T10:58:17+02:00
A)15/18X9/25
=135/450
= 9*45/ 10*45
= 9/10

b)1,8X10/9
=18/9
= 2
c)24/49X7/8
=168/432
=21*8/54*8
= 21/54
=7*3/18*3
=7/18

d)55X4/33
=220/33
20*11/3*11
20/3

e)56/65X35/48
8*7/13*5 x 7*5/8*6
= 7/13x7/6
= 49/78

f)26/34X54/39
13*2/17*2 x 27*2/13*3 = 54/51