(-7/12)-1/2=
C chrisr Full Member Joined Nov 29, 2009 Messages 355 Jan 19, 2010 #3 −712−12=−712−66 12=−712−612=112(−7−6)=112(−13)=−1312\displaystyle -\frac{7}{12}-\frac{1}{2}=-\frac{7}{12}-\frac{6}{6}\ \frac{1}{2}=-\frac{7}{12}-\frac{6}{12}=\frac{1}{12}(-7-6)=\frac{1}{12}(-13)=-\frac{13}{12}−127−21=−127−66 21=−127−126=121(−7−6)=121(−13)=−1213
−712−12=−712−66 12=−712−612=112(−7−6)=112(−13)=−1312\displaystyle -\frac{7}{12}-\frac{1}{2}=-\frac{7}{12}-\frac{6}{6}\ \frac{1}{2}=-\frac{7}{12}-\frac{6}{12}=\frac{1}{12}(-7-6)=\frac{1}{12}(-13)=-\frac{13}{12}−127−21=−127−66 21=−127−126=121(−7−6)=121(−13)=−1213
