Question

Simplify and evaluate : (-2/5)-(-3/10)-(-4/7)​

Answer 1

Answer:

$(\frac{ - 2}{5} ) - ( \frac{ - 3}{10} ) - ( \frac{ - 4}{7} )$

$( \frac{ - 2}{5} ) + \frac{3}{10} + \frac{4}{7}$

$\frac{ - 28 + 21 + 40}{70}$

$\frac{33}{70}$

Answer 2

$(\frac{ - 2}{5} ) - ( \frac{ - 3}{10} ) - ( \frac{ - 4}{7} )$

$= \frac{ - 2}{5} + \frac{3}{10} + \frac{4}{7}$

$=\frac{10 \times - 2 + 5 \times 3}{50} + \frac{4}{7}$

$=\frac{ - 20 + 15}{50} + \frac{4}{7}$

$= \frac{ - 5}{50} + \frac{4}{7}$

$= \frac{ - 35 + 200}{350}$

$= \frac{165}{350}$

$= \frac{33}{70}$

Answer. 33/70