Question

a)2/21+1/7
b)-11/12-1.2/5

Answer 1

A )$\frac{2}{21} + \frac{1}{7}, amplificam la a doua cu 3 si rezulta: \frac{2}{21}+ \frac{3}{21}$ si apoi rezulta $\frac{5}{y21}$
B) [tex] \frac{-11}{12} - \frac{1.2}{5}, amplificam la prima cu 5, iar la a doua cu 12 [/tex] si rezulta $\frac{-55}{60} - \frac{14,4}{60} = \frac{-69,4}{60}$