2times 10 to the 5 divided by 2

(2*10^5) / 2

you do the exponent first and get

(2*100000) / 2

then do the first multiplication:

200000/2

then divide by 2:

100000

Easier way:

(2 blerks) divided by (2) = 1 blerk

(2 miles) divided by (2) = 1 mile

(2 stars) divided by (2) = 1 star

(2 notebooks) divided by (2) = 1 notebook

(2 silly questions) divided by (2) = 1 silly question

(2 of anything) divided by (2) = 1 of the same thing.

(2 of 10⁵) divided by (2) = 1 of 10⁵.