Question

Va rog rapid am dat multe puncteee

Answer 1

Răspuns: $\boxed{\boxed{\bf \dfrac{53}{18}}}$

Explicație pas cu pas:

Salutare!

$\bf 7:\bigg(2,5-\dfrac{2}{5}\bigg)+\dfrac{11}{30}\cdot \dfrac{5}{3}-1$

$\bf 7:\bigg(\dfrac{25}{10} -\dfrac{2}{5}\bigg)+\dfrac{11}{6}\cdot \dfrac{1}{3}-1=$

$\bf 7:\bigg(\dfrac{25}{10} -\dfrac{2\cdot 2}{10}\bigg)+\dfrac{11}{18}-1=$

$\bf 7:\dfrac{25-4}{10} +\dfrac{11}{18}-1=$

$\bf 7:\dfrac{21}{10} +\dfrac{11}{18}-1=$

$\bf 7\cdot\dfrac{10}{21} +\dfrac{11}{18}-1=$

$\bf \not7\cdot\dfrac{10}{\not21} +\dfrac{11}{18}-1=$

$\bf \dfrac{10}{3} +\dfrac{11}{18}-1=$

$\bf \dfrac{10\cdot 6}{18} +\dfrac{11}{18}-\dfrac{18}{18} =$

$\bf \dfrac{60+11-18}{18} =$

$\boxed{\boxed{\bf \dfrac{53}{18}}}$

#copaceibrainly                                  

Answer 2

Răspuns:

2,5=25/10

7:(25/10-²⁾2/5)+11/30·(1·3+2)/3-1=

7:(25/10-4/10)+11/30·5/3-1=

7:21/10+11/30·5/3-1=

7·10/21+55/90-1=

(70/21)⁽³+(55/90)⁽⁵-1=

⁶⁾10/3+11/18-¹⁸⁾1=

60/18+11/18-18/18=

53/18