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Bonjour aidez moi svp c urgen B=1/2+5/4+7/2. C=10/3+5/6+19/12. D=5/2+11/18+5/3. E=13/10-45/100+2. F=1+7/3-2/15-4/5. G=3-1/30+1/5-1/3. H=7/2-2-4/6-1/12 mrc bcp a ceux ou celle qui maideron c trop gentil de votre part

Répondre :

Exemple : 

A = 1/2 + 5/4 + 7/2
   = 1*2/2*2 + 5/4 + 7*2/2*2
   =  2/4  + 5/4 + 14/4
   =  21/4
bonjour

B=1/2+5/4+7/2 = 1/2+7/2+5/4 = 8/2 +5/4 = 16/4 +5/4 = 21/4

C=10/3+5/6+19/12 = 40/12 +10/12+19/12 = 69/12 = 23x3/4x3 = 23/4

D=5/2+11/18+5/3.= 45/18 +11/18 +30/18 = 86/18 = 43/9

E=13/10-45/100+2 = 130/100 -45/100 +200/100 =330/100-45/100 = 285/100 = 57x 5 /20x5 = 57/20

F=1+7/3-2/15-4/5 = 15/15 +35/15 -2/15 -12/15 =50/15 -14/15 = 36/15 = 12x3/5x3 = 12/5
 
G=3-1/30+1/5-1/3 = 90/30 -1/30 +6/30 -10/30 = 96/30 -11/30 = 85/30 = 17x5/6x5 = 17/6

. H=7/2-2-4/6-1/12  = 42/12 -24/12 -8/12 -1/12 = 42/12-33/12 = 9/12 = 3/4