Răspuns :
Răspuns:Vezi explicatia!
Explicație pas cu pas:a) 36/3,13/7=>n.c.=21=>252/21,39/21. b)7/12,13/6=>7/12,26/12. n.c=12. c)15/4,9/16=>n.c=16. d) 3/5,5/12....n.c.=60...=>36/60,25/60. e) 13/11,7/9,n.c.=99=>117/99,77/99. f)n.c.=84....=>224/84,78/84. g)18/42,77/35....n.c.=90/210,462/210. h) 2/7,3/8,5/14,......n.c.=56.=>16/56,21/56,20/56. O zi excelenta!