Question

 

 

Answer 1

`a) 4/5 + 1/4 xx 2/5`

`=4/5 + 1/2 xx 1/5`

`=4/5 + 1/10`

`=8/10 + 1/10`

`=9/10`

`b)7/12 + 3/4 : 3/8 - 1/4`

`=7/12 + 3/4 xx 8/3 -1/4`

`=7/12 + 2 -1/4`

`=7/12 + 24/12 - 3/12`

`=28/12`

`=7/3`

Answer 2

\(\dfrac{4}{5}\) + \(\dfrac{1}{4}\) x \(\dfrac{2}{5}\)

= \(\dfrac{4}{5}\) + \(\dfrac{1}{10}\) 

= \(\dfrac{8}{10}\) + \(\dfrac{1}{10}\)

= \(\dfrac{9}{10}\) 

 

\(\dfrac{7}{12}\) + \(\dfrac{3}{4}\) : \(\dfrac{3}{8}\) - \(\dfrac{1}{4}\)

= \(\dfrac{7}{12}\) + 2 - \(\dfrac{1}{4}\)

= \(\dfrac{7}{12}\) + \(\dfrac{24}{12}\) - \(\dfrac{3}{12}\) 

= \(\dfrac{31}{12}\) - \(\dfrac{3}{12}\)

= \(\dfrac{28}{12}\)

\(\dfrac{7}{3}\)