A negative decimal plus a negative decimal equals a more negative decimal
100 That is an estimate.
3/4 plus 3/10 as a decimal is 1.05
10.05006009
It is 8419.
100 plus 10 plus 1 plus 110 is 221 when expressed as a decimal to base 10.
111.1
It is 920.307
2 decimal, or 10 binary.
10.39
8.81?
It is 0.98