Question

tính

\(\frac{-1}{39}+\frac{-1}{52}\)

Answer 1

\(-\frac{1}{39}+-\frac{1}{52}=\frac{-4}{156}+-\frac{3}{156}=-\frac{7}{156}\)

Answer 2

\(\frac{-1}{39}+\frac{-1}{52}=\frac{-7}{156}\)

Answer 3

\(\frac{-1}{36}+\frac{-1}{52}=\frac{-4}{156}+\frac{-3}{156}=\frac{-7}{156}\)

Answer 4

\(\frac{-1}{39}+\frac{-1}{52}=\frac{-52+-39}{2028}=\frac{-91}{2028}=\frac{-7}{156}\) (k cho mình với nhé!)