Question

1\3+5\21-(3\14-1\5)=? Va rog frumos rezolvați repedeee!!!

Answer 1

Numitorul comun
3=3
21=3x7
14=2x7
5=5
_______
c.m.m.m.c.=2x3x5x7=210
$\frac{1}{3} + \frac{5}{21} - \frac{3}{14} + \frac{1}{5} = \frac{70+50-45+42}{210} = \frac{117}{210} = \frac{39}{70}$