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Nicoleeta
a fost răspuns

Calculati , folosind eventual prorpietatea de asociativitate:
a) 4/7 - 2/13 + 2/7 + 4/13 + 1/7 + 5/17 + 11/3 - 5/17;


Răspuns :

4/7-2/13+2/7+4/13+1/7+5/17+11/3-5/17=
(4/7+1/7+2/7)-(2/13+4/13)+(5/17-5/17)+11/3=
7/7-6/13+11/3=1-6/13+11/3
aducem la acelasi numitor
39/39-18/39+143/39=164/39
sper ca e bine

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