Question

work out the sum of 1/2 1/7 and 2/5 in its simplest
form

Answer 1

${\huge{ \color{red}{\underline{\underline {\cal \color{black}{Answer}}}}}}$

${ \large{ \boxed {\red{ \frac{1}{2} + \frac{1}{7} + \frac{2}{5} }}}}$

First take the L.C.M. to make the denominators same.

L.C.M. of 2,5 and 7=70

$\implies \frac{1}{2} \times \frac{35}{35} = \frac{35}{70} \\ \\ \implies \frac{1}{7} \times \frac{10}{10} = \frac{10}{70} \\ \\ \implies \frac{2}{5} \times \frac{14}{14} = \frac{28}{70} \\ \\ \implies \frac{35 + 1 \cancel0 + 28}{7 \cancel0} = \frac{ \cancel{63}}{ \cancel{7} } = 9$

☺Hope it helps you....

Answer 2

Answer:

• Solution :

First we have to take the LCM to make the denominators same.

LCM of 2, 5 and 7 = 70

• Now :

$\implies \frac{1}{2} + \frac{35}{35} = \frac{35}{70} \\ \\ \implies\frac{1}{7} + \frac{10}{10} = \frac{10}{70} \\ \\ \implies\frac{2}{5} + \frac{14}{14} = \frac{28}{70} \\ \\ \: \: \implies \frac{30 + 10 + 28}{70} = \frac{69}{7} = 9$