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Meilleure réponse !
2014-02-11T20:00:48+01:00
153x53
40    8x5    8

279x33
63    9x7    7

222x11
26    2x13

24
3x88
15    3x5    5

63 =  9x7  =   7
99    9x11     11

442x15 15
84    2x28     28

 76 2x1919
120    2x30    30

1252x2525
135    2x27    27

             Voila Derien !!! §§§ :)  Et Bonne Chance Pour Tes Travaille




2014-02-11T20:10:51+01:00
EXERCICE 16
a) 15/40 = 15:5/40 :5 = 3/8
b) 27/63 = 27 :9 / 63:9 = 3/7
c) 22/26 = 22:2 / 26:2 = 11/13
d) 24/15 = 24:3 /15:3 = 8/5
EXERCICE 17
a) 63/99 = 63:9/ 99:9 = 7/11
b) 45/84 = 45:3/84:3 = 15/28
c) 76/120 = 76 :4 /120:4 = 19/30
d) 125/135 = 125:5 /135:5 =  25/37
EXERCICE 22
a) 198/72 = 192:6/ 72:6 = 32/12 = 32:4/12:4 = 8/3
b) 324/540 = 324:12/540:12 = 27/45 = 27:9/45:9 = 3/5
c) 315/360 = 315:15 / 360:15 =  21/24 = 21:3/24:3 = 7/8
d) pas sur la copie, désolée
EXERCICE 23
a) 20/14 = 10/7 = 40/28
b) 72/48= 6/4 = 12/8
c) 15/45 = 30/90 = 1/3
d) 40/64 = 5/8 = 20/32