qua nó, làm cho nó một F. sau 0 là 10, vượt qua nó, làm cho nó một F. Sau đó, cuối cùng 0 10 "Got đó. Điều gì xảy ra giữa hai số 0 hoạt động như môi giới cho vay giữa F và ngoài cùng bên phải 0, giữ một hoa hồng trong các hình thức có giá trị đủ để cho phép trừ trong các cột của riêng họ. | cross it out make it an F. Make the next 0 a 10 cross it out make it an F. Then make the last 0 a 10. Got that What happens is that the middle two 0 s act as loan brokers between the F and the rightmost 0 keeping a commission in the form of enough value to allow for subtraction in their own columns. Each column to the right of the last column borrows 10 from its neighbor to the left and loans 1 to the neighbor on its right. After all the borrows trickle through the upper number what we have looks like this minus all those cross-outs E F F1 OH - 3 B 6 CH At this point each columnar subtraction can take place and the difference is B494H. In remembering your grade-school machinations don t fall into the old rut of thinking cross out the 10 make it a 9. In the world of hexadecimal 10H -1 F. Cross out the 10 make it an F. What s the Point Even if you have a hex calculator or a hex-capable screen calculator to do your figuring for you the point I m getting at is practice. Hexadecimal is the lingua franca of assemblers to multiply-mangle a metaphor. The more you burn a gut-level understanding of hex into your reflexes the easier assembly language will be. Furthermore understanding the internal structure of the machine itself will be much easier if you have that intuitive grasp of hex values. We re laying important groundwork here. Take it seriously now and you ll lose less hair later on. Binary Hexadecimal is excellent practice for taking on the strangest number base of all Binary. Binary is base 2. Given what we ve learned about number bases so far we can surmise the following about base 2. Each column has a value two times the column to its right. There are only two digits 0 and 1 in the base. Counting is a little strange in binary as you might imagine. It goes like this 0 1 10 11 100 101 110 111 1000. Because it sounds absurd to say Zero one ten eleven one hundred. in binary you simply enunciate the digits followed by the word binary. For example most people say .
