Question

Scrieți 6 proporții derivate din proportia:8/9=40/45.

Answer 1

$\frac{8}{9}= \frac{40}{45}= \frac{16}{18}= \frac{24}{27}= \frac{48}{54}= \frac{80}{90}=$$\frac{800}{900}= \frac{8000}{9000}$

Answer 2

 [tex]\frac{8}{9}=\frac{40}{8}\\ .\;\;\Downarrow\\ 1).\;\frac{45}{9}=\frac{40}{5}\;;\;\\ .\\ 2).\;\frac{8}{40}=\frac{9}{45}\;;\;\\ .\\ 3).\;\frac{9}{8}=\frac{45}{40}\;;\;\\ .\\ 4).\;\frac{8\cdot2}{9\cdot2}=\frac{40}{45}\;;\;\\ .\\ 5).\;\frac{8+9}{9}=\frac{40+45}{45}\Leftrightarrow\;\;\frac{17}{9}=\frac{85}{45}\;;\;\\ .\\ 6).\;\frac{8}{9-8}=\frac{40}{45-40}\Leftrightarrow\;\;\frac{8}{1}=\frac{40}{5}\;; [/tex]