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Efectuati operatiile, scriind rezultatul sub forma unei fractii ireductibile:2 supra 12+5 supra 24=; 26 supra 21+ 13 supra 14=; 4 supra 15+ 3 supra 20=; 5 supra 24+ 1 supra 12+3 supra 8=; 7 supra 30-3 supra 20=; 8 supra 15- 9 supra 20=; 8 supra 21-4 supra 35=; 7 supra 6- 3 supra 4- 1 supra 12.

Răspuns :

Prints
[tex] \frac{2}{12}+ \frac{5}{24} = \frac{9}{24} [/tex]
[tex] \frac{26}{21}+ \frac{13}{14} = \frac{91}{48} [/tex]
[tex] \frac{4}{15}+ \frac{3}{20} = \frac{5}{12} [/tex]
[tex] \frac{5}{24}+ \frac{1}{12}+ \frac{3}{8}= \frac{2}{3} [/tex]
[tex] \frac{7}{30}- \frac{3}{20}= \frac{1}{12} [/tex]
[tex] \frac{8}{15}- \frac{9}{20} = \frac{1}{12} [/tex]
[tex] \frac{8}{21} - \frac{4}{35} = \frac{4}{15} [/tex]
[tex] \frac{7}{6}- \frac{3}{4} - \frac{1}{12} = -\frac{1}{3} [/tex]
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