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Mai am nev de ajutor
(-2/11)+7/15+13/11+8/15-1


Răspuns :

(-2/11)+7/15+13/11+8/15 -1 =
aducem fractiile la acelasi numitor comun:( 11 × 15 = 165)

= -2×15/165+7×11/165+13×15/165+8×11/165-165/165 =

= -30/165+77/165+195/165+88/165-165/165 =
= (-30+77+195+88-165)/165 =

= 165/165 =

= 1