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Efectuati: /-supra
a) 1/5-3/5+7/5
b) 17/111-26/111+120/111
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Răspuns :

a) /1-3+7/ tot supra 5.=5/5=1
b)/17-26+120/ tot supra 111=111/111=1........sp.aj.
a) 1/5-3/5+7/5 = -2/5+7/5 = 5/5 = 1.

b) 17/111-26/111+120/111 = -9/111+120/111 = 111/111 = 1.



I hope I helped you :)