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calculati ,folosind eventual proprietatea de asociativitate a) 4/7 minus 2/13 plus 2/7 plus 4/13 plus 1/7 plus5/17 plus 11/13 minus 5 /17


Răspuns :

A)  4/7 - 2/13 + 2/7 + 4/13 + 1/7 + 5/17 + 11/13 - 5/17 =
(4/7 + 2/7 + 1/7) + (4/13 - 2/13 + 11/13) + (5/17 - 5/17) =
7/7 + 13/13 = 
1 + 1 = 
2