Question

-1 phần 3 + 2 phần 5  -  2 phần 15 tính ạ

Answer 1

\(\dfrac{-1}{3}+\dfrac{2}{5}-\dfrac{2}{15}=\dfrac{-5}{15}+\dfrac{6}{15}+\dfrac{2}{15}=\dfrac{3}{15}=\dfrac{1}{5}\)

Answer 2

-1/3+2/5-2/15

=-5/15+6/15-2/15

=-1/15