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Efectuați:8/3-4/3=.......;8/7-5/7=.....; 14/5-6/5; 17/3-7/3; 22/9-8/9; 25/7-9/7.​

Răspuns :

Răspuns:

8/3-4/3=4/3

8/7-5/7=3/7

14/5-6/5=8/5

17/3-7/3=10/3

22/9-8/9=14/9

25/7-9/7=16/7

Rezolvare:

Fracțiile au același numitor. Vom scădea numărătorii:

[tex]\dfrac{8}{3} - \dfrac{4}{3} = \dfrac{8-4}{3} = \dfrac{4}{3}[/tex]

[tex]\dfrac{8}{7} - \dfrac{5}{7} = \dfrac{8-5}{7} = \dfrac{3}{7}[/tex]

[tex]\dfrac{14}{5} - \dfrac{6}{5} = \dfrac{14-6}{5} = \dfrac{8}{5}[/tex]

[tex]\dfrac{17}{3} - \dfrac{7}{3} = \dfrac{17-7}{3} = \dfrac{10}{3}[/tex]

[tex]\dfrac{22}{9} - \dfrac{8}{9} = \dfrac{22-8}{9} = \dfrac{14}{9}[/tex]

[tex]\dfrac{25}{7} - \dfrac{9}{7} = \dfrac{25-9}{7} = \dfrac{16}{7}[/tex]