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Calculați: 2 a) 20/9×6/25-2/27×9/8


Răspuns :

Răspuns:

  • a) = 9/20

Explicație pas cu pas:

20/9 × 6/25  -  2/27 × 9/8 =

4/3 × 2/5  -  1/3 × 1/4 =

8/15 - 1/12 =

(8×4 - 5)/60 =

27/60 =

9/20

Răspuns:

[tex]a) 20/9*6/25-2/27*9/8\\\\\frac{20*6}{6*25} -\frac{2*9}{27*8} =\\\\\frac{8}{15}-\frac{1}{12} =\\\\numitor .comun-60\\\\\frac{32-5}{60} =\frac{27}{60} =\frac{9}{20}[/tex]