Question

How do you evaluate `140- 893.45+ 308.56- 204.79- 50`?

Answer 1

`140-893.45+308.56-204.79-50=-699.68`

Explanation:

To evaluate `140-893.45+308.56-204.79-50` or similar problems

1. first make all such numbers upto same places of decimal and above becomes `140.00-893.45+308.56-204.79-50.00`
2. split numbers with positive and negative sign before them separately and add them up separately. Here we have `color(blue)(140.00+308.56=448.56)` and `color(red)(893.45+204.79+50.00=1148.24`
3. subtract smaller number from larger one. Here, we have `color(red)(1148.24)-color(blue)(448.56)=699.68`
4. We have almost got the answer. Only thing left is putting beore it the sign of minus, as sum of those with sign minus was greater and hence we have `140-893.45+308.56-204.79-50=-699.68`

Note that if first number does not have a sign (minus or plus) before it, it means plus.