Question

Answer 1

\(t.=-\dfrac{7}{4}-\left(-\dfrac{1}{9}-\dfrac{37}{18}\right)=-\dfrac{7}{4}+\dfrac{13}{6}=\dfrac{5}{12}\) 

\(u.-\dfrac{5}{6}+\dfrac{11}{40}=-\dfrac{67}{120}\) 

\(v.=-\dfrac{14}{15}+\left(-\dfrac{1}{2}\right)=-\dfrac{43}{30}\) 

\(x=\dfrac{3}{12}-\dfrac{1}{10}=\dfrac{3}{20}\)

Answer 2

`-1,75 - (-1/9 - 2 1/18)`

`=-7/4 + 1/9 + 2 1/18`

`=-7/4 + 1/9 + 37/18`

`=-59/36 + 37/18`

`=5/12`

___________________________

`-5/6 - (-3/8 + 1/10)`

`=-5/6 + 3/8 -1/10`

`=-11/24 - 1/10`

`=-67/120`

_____________________

`2/5 + (-4/3) + (-1/2)`

`=2/5 - 4/3 - 1/2`

`=12/30 - 40/30 - 15/30`

`=-43/30`

___________________________

`3/12 - (6/15 - 3/10)`

`=1/4 -(2/5-3/10)`

`=1/4 - 2/5 + 3/10`

`=-3/20 + 3/10`

`=-3/20 + 6/20`

`=3/20`