(2/3.5/7 + 2/3: 7/2). -1/3
=(10/21 + 2/3x2/7 ) . -1/3
=(10/21 + 4/21) . -1/3
=-10/63 - 4/63
=-14/63
(2/3.5/7+2/3:7/2)-1/3
=(2/3.5/7+2/3x2/7)-1/3
=[2/3.(5/7+2/7)]-1/3
=[2/3x1]-1/3
=2/3-1/3
=1/3
HT
\(\left(\frac{2}{3}\times\frac{5}{7}+\frac{2}{3}:\frac{7}{2}\right)\times\left(-\frac{1}{3}\right)\)
\(\left(\frac{2}{3}\times\frac{5}{7}+\frac{2}{3}\times\frac{2}{7}\right)\times\left(-\frac{1}{3}\right)\)
\(\frac{2}{3}\left(\frac{5}{7}+\frac{2}{7}\right)\times\left(-\frac{1}{3}\right)\)
\(\frac{2}{3}\times\left(-\frac{1}{3}\right)\)
\(-\frac{2}{9}\)
