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 :
-
-
+
First thing is first : let's subtract the first two fractions.
-
. 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.
-
. That makes
. (Now we subtract this and the next fraction. Again, we find the common multiple. The common multiple is 40.)
- turns into
- . (-17 - 15 is -32.)
+ : (use common multiple, it changes)
+ .
(-32 + 50 is 18.)
.
Simplified :
ANS. IN FRACTION FORM
:
ANS. IN DECIMAL FORM
: 0.45