Bonjour,
exercice 1
10/6 = 20/12
10/5 = 70/35
90/70 =9/7
40/10 = 4/10
8/10 = 64/60
8/20 = 2/5
8/4 = 40/20
2/5 = 14/35
Exercice 2
(14*27)/( 27*10)
= 14/10 ( on simplifie par 27)
= 7/5
(5*36)/(24*5)
= 36/24 ( on simplfie par 5)
= 18/12 = 9/6= 3/2
(32*9) /(21*64)
= 288/ 1 344
= 144/672 = 72/33 = 24/11
(7*80)/ (50*21) =
= (7*8)/ (5*21) ( on divise par 10)
= 56/105 = 8/15 ( on divise par 7)
