d) Aflați suma numerelor:
dau coroana

[tex] \frac{2}{5} = 0.4 \\ \\ 0.4 + ( - 1.25) + 2.5 = 1.65[/tex]
[tex]\it \dfrac{2}{5}+(-1,25)+2,5=0,4-1,25+2,5=2,9-1,25=1,65[/tex]