\(-\dfrac{7}{12}.1\dfrac{3}{8}-4\dfrac{5}{8}.\dfrac{7}{12}+\dfrac{1}{2}\\ =-\dfrac{7}{12}.\dfrac{3}{8}-\dfrac{20}{8}.\dfrac{7}{12}+\dfrac{1}{2}\\ =-\dfrac{21}{96}-\dfrac{140}{96}+\dfrac{1}{2}\\ =-\dfrac{21}{96}-\dfrac{140}{96}+\dfrac{48}{96}\\ =-\dfrac{113}{96}\)
=\(\dfrac{7}{12}x\left(-1\dfrac{3}{8}\right)-\left(4\dfrac{5}{8}\right)x\dfrac{7}{12}+\dfrac{1}{2}\)
\(=\dfrac{7}{12}x\left(-1\dfrac{3}{8}-4\dfrac{5}{8}\right)+\dfrac{1}{2}\)
\(=\dfrac{7}{12}x\left(-\dfrac{11}{8}-\dfrac{37}{8}\right)+\dfrac{1}{2}\)
\(=\dfrac{7}{12}x\left(-6\right)+\dfrac{1}{2}\)
\(=-\dfrac{7}{2}+\dfrac{1}{2}=-\dfrac{6}{2}=-3\)
\(-\dfrac{7}{12}\times1\dfrac{3}{8}-4\dfrac{5}{8}\times\dfrac{7}{12}+\dfrac{1}{2}\)
\(=-\dfrac{7}{12}\times\dfrac{11}{8}-\dfrac{37}{8}\times\dfrac{7}{12}+\dfrac{1}{2}\)
\(=\dfrac{7}{12}\times\left(-\dfrac{11}{8}-\dfrac{37}{8}\right)+\dfrac{1}{2}\)
\(=\dfrac{7}{12}\times\left(-6\right)+\dfrac{1}{2}\)
\(=-\dfrac{7}{2}+\dfrac{1}{2}\)
\(=-\dfrac{6}{2}=-3\)
`-7/12xx1 3/8-4 5/8xx7/12+1/2`
`=-7/12xx3/8-20/8xx7/12+1/2`
`=-21/96-140/96+1/2`
`=-21/96-140/96+48/96`
`=-113/96`
