Calculati:
2supra5-4supra3*(-9supra8)
Va rog mult imi trebuie acum
dau coroana

2/5 - 4/3 • (-9/8) =
2/5 + 3/2 =
(2×2+3×5)/10 =
19/10 =
1,9

[tex] \frac{2}{5} - \frac{4}{3} \times ( - \frac{9}{8} )[/tex]

[tex] = \frac{2}{5} + \frac{36}{24} [/tex]

[tex] = \frac{2}{5} + \frac{6}{4} [/tex]

[tex] = \frac{8}{20} + \frac{30}{20} [/tex]

[tex] = \frac{8 + 30}{20} [/tex]

[tex] = \frac{38}{20} [/tex]

[tex] = \frac{19}{10} [/tex]

[tex] = 1.9[/tex]