In binary system 100 + 101 = 1001. write decimal equivalent of the summand and sum.

if im right its 5.254 but im not sure if im absolutely right so check first

The summands are 4 and 5. The sum is 9.

Step-by-step explanation:

In the binary system, the digits, starting at the right and moving to the left are:

1's

2's

4's

8's

etc.

100 = 0 units + 0 2's + 1 four = 0 + 0 + 4 = 4

101 = 1 unit + 0 2's + 1 4's = 1 + 0 + 4 = 5

In decimal, the addition is:

4 + 5 = 9

The summands are 4 and 5. The sum is 9.