Question

0,45+2,(3)+3,(15)+5,55

Answer 1

0,45= 45/100 = 9/20

2,(3) = (23-2) / 9= 21/9 = 7/3

3,(15)= (315-3)/99= 312/99= 104/33

5,55= 555/100= 111/20

$\frac{9}{20} + \frac{7}{3} + \frac{104}{33} + \frac{111}{20} =$

aducem la acelasi numitor 660

$\frac{9*33}{660} + \frac{7*220}{660} + \frac{104*20}{660} + \frac{111*33}{600} = \frac{297+1540+2080+3663}{660} = \frac{7580}{660} = \frac{758}{66} = \frac{379}{33}$