1,
3/5 - (3/5+1/3)
= 3/5 - 3/5 - 1/3
= 0 - 1/3
= -1/3
2.
3/7 x 4/5 + 3/7 x 1/5 - 2/7
= 3/7.(4/5+1/5) - 2/7
= 3/7 . 1 - 2/7
= 3/7-2/7 = 1/7
1) 3/5 - (3/5 + 1/3)
= 3/5 - 3/5 +1/3
= 0+1/3
=1/3
2) 3/7x4/5+3/7.1/5-2/7
=3/7.(4/5+1/5)-2/7
=3/7.1-2/7
=3/7-2/7
=1/7
\(\frac{3}{5}-\left(\frac{3}{5}+\frac{1}{3}\right)\)
=\(\frac{3}{5}-\frac{3}{5}-\frac{1}{3}\)
=
a)\(\frac{3}{5}-\left(\frac{3}{5}+\frac{1}{3}\right)=\frac{3}{5}-\left(\frac{9}{15}+\frac{5}{15}\right)=\frac{3}{5}-\frac{14}{15}=\frac{-1}{3}\)
b)\(\frac{3}{7}\cdot\frac{4}{5}+\frac{3}{7}\cdot\frac{1}{5}-\frac{2}{7}=\frac{3}{7}\cdot\left(\frac{4}{5}+\frac{1}{5}\right)-\frac{2}{7}=\frac{3}{7}-\frac{2}{7}=\frac{1}{7}\)
