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Da1870
a fost răspuns

3 supra 8 + 13 supra 117

Răspuns :

3/8 +13/(9*13) = 3/8 + 1/9 = 27/72 +8/72= 35/72
Ionysteaua2000
[tex] \frac{3}{8} + \frac{13}{117} =[/tex] -aducem la acelsi numitor anume 936
[tex] \frac{351}{936} + \frac{104}{936} = \frac{455}{936} [/tex] -simplificam prin 13
=[tex] \frac{35}{72} [/tex]