`a// 1/[-6]+13/[-15]=[-5]/30-26/30=-31/30`
`b// 12/5 .(10/3-5/12)=12/5 .(40/12-5/12)=12/5 .35/12=7`
`-1/6 + 13/-15`
`= -1/6 + -13/15`
`= -15/90 + -78/90`
`= (-15 + -78)/90`
`= -93/90 = -31/30`
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`12/5 . (10/3 - 5/12)`
`=12/5 . (40/12 - 5/12)`
`= 12/5 . 35/12`
= 7`
a) ` 1/-6 + 13/(-15) = -5/30 - 26/30 = -31/30`
b) \(\dfrac{12}{5}\cdot\left(\dfrac{10}{3}-\dfrac{5}{12}\right)=\dfrac{12}{5}\cdot\left(\dfrac{40}{12}-\dfrac{5}{12}\right)=\dfrac{12}{5}\cdot\dfrac{35}{12}=\dfrac{35}{5}=7\)
a) \(\dfrac{1}{-6}+\dfrac{13}{-15}=\dfrac{-1}{6}+\dfrac{-13}{15}=-\dfrac{5}{30}-\dfrac{26}{30}=-\dfrac{31}{30}\)
b) \(\dfrac{12}{5}\cdot\left(\dfrac{10}{3}-\dfrac{5}{12}\right)=\dfrac{12}{5}\cdot\left(\dfrac{40}{12}-\dfrac{5}{12}\right)=\dfrac{12}{5}\cdot\dfrac{35}{12}=\dfrac{35}{5}=7\)
