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  • Utilisateur Brainly
2013-12-23T13:24:34+01:00
Ex 3:
A=2/3+1/4-5/9
  =24/36+9/36-20/36
  =13/36

B=1/2-4/6-6/8-2/4+2/3+3/4
  =1/2-2/3-3/4-1/2+2/3+3/4
  =0

C=9/4-9/3-54/2
  =9/4-3-27
  =9/4-30
  =9/4-120/4
  =-111/4