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Exercițiul 7
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Exercițiul 7 class=

Răspuns :

a) (/450-/200) -(/1250-/1800)
Am scos de sub radical
15/2-10/2-25/2-30/2
=10/2

b) 19/5-(18/5-13/5) -12/5
=5/5

c)4/10-(9/10-31/10+26/10)
=4/10-(-22/10+26/10)
=4/10-4/10
=0

d)25/7-(21/7+26/7-18/7)
=25/7-(47/7-18/7)
=25/7-29/7
=-4/7