+ 21
+ 21
Geng aren't you at the first year of uni?
It might be, I can assure you, you'll learn a lot more beyond what you're learning now. If you're doing any kind of computational mathematics or internet software stuff you probably will.
Binary is extremely easy though.
Ely if this makes sense, to convert binary to decimal count from the right side starting at 1 and each digit doubles in value as you go. If it's a 1 you count it, if it's a zero you don't then add up all the 1s value.
So
10 is 2+0 = 2 in decimal
111 would be 4+2+1 since they're all 1s so 7.
101 would be 4+0+1 so 5.
1111 would be 8+4+2+1 so 15 and so on
+23