Question

What is the value of the expression below? 3/8+(-4/5)+(-3/8)+5/4

Answer 1

Before I put in the actual expression, let's figure out which sign is which. A positive sign and a negative sign make a negative sign. This applies for the first two pairs of signs. That would make it :

$\frac{3}{8}$ - $\frac{4}{5}$ - $\frac{3}{8}$ + $\frac{5}{4}$

First thing is first : let's subtract the first two fractions. $\frac{3}{8}$ - $\frac{4}{5}$. We would have to find the common multiple between 8 and 5, and that would be 40. So we change them both to 40, and we do to the numerator what we do to the denominator. $\frac{15}{40}$ - $\frac{32}{40}$. That makes $\frac{-17}{40}$. (Now we subtract this and the next fraction. Again, we find the common multiple. The common multiple is 40.)

$\frac{-17}{40}$ - $\frac{3}{8}$ turns into $\frac{-17}{40}$ - $\frac{15}{40}$. (-17 - 15 is -32.)

$\frac{-32}{40}$ + $\frac{5}{4}$ : (use common multiple, it changes) $\frac{-32}{40}$ + $\frac{50}{40}$.

(-32 + 50 is 18.) $\frac{18}{40}$.

Simplified : $\frac{9}{20}$

ANS. IN FRACTION FORM : $\frac{9}{20}$
ANS. IN DECIMAL FORM : 0.45

Answer 2

It will help you!

=-17/40+-3/8+5/4

= -4/5+5/4

= 9/20 

And the answer is 9/20 or decimals (0.45)