Subtract in 2?
If you mean subtract 2 :
20 - 2
18
If you mean divide by 2 (which you're probably not but just to make sure) :
20 ÷ 2
10
Subtract in 2?
If you mean subtract 2 :
20 - 2
18
If you mean divide by 2 (which you're probably not but just to make sure) :
20 ÷ 2
10