ta có 10/7 + 7/5 + 18/7 + 3/5 - 1/3
= (10/7 + 18/7)+(7/5+3/5)-1/3
=28/7 +10/5 -1/3
=4+2 -1/3
=6-1/3
=18/3-1/3=17/3
\(\frac{10}{7}+\frac{7}{5}+\frac{18}{7}+\frac{3}{5}-\frac{1}{3}\)
\(=\frac{17}{3}\)
(10/7+18/7)+(7/5+3/5)-1/3
=4+2-1/3
=6-1/3
18/3-1/3
=17/3