# for a Computer?

## How To Add Page Numbers to PDF Online?

Sign & Make It Legally Binding

## For a computer, is it harder to add, multiply, subtract, or divide smaller numbers than larger numbers?

Computers usually implement subtraction by negating the subtrahend (making it negative) and adding it to the minuend. Instead of. A – B T do A + (-B) This eliminates the need for a separate logic circuit for subtraction, you just need to apply a simple conversion before adding. The result you’re seeing isn’t wrong per se, so your subtraction logic is working correctly. Then again, it isn’t right either. Let’s see why. A 4-bit register can contain 16 (2^4) distinct values. For unsigned numbers, then, the range is 0–15. Subtracting a larger number from a smaller one in this case will always produce a wrap-around in the number line. 2-3 = 15; 2-4 = 14; etc. This is known as modular math and can be easily seen by drawing a clock face with the numbers 0–15. In order to represent negative values, we have assign half the range to them, which then becomes -8 to +7. Now when we subtract, say, 7 from 2 we get -5. In binary these “signed” values are the exact same ones on the unsigned number line, we just consider them to be negative when the highest order bit (2^3) is 1. So -1 = 1111; -2 = 1110; -3 = 1101, etc. These are known as the twos-complement of the positive values. The twos-complement is found by inverting all the bits and adding one. The beauty of this way of representing negative numbers is that the math is exactly the same as for unsigned numbers. Now let’s examine your results. First, we need to ignore that 5th bit, since there’s no room for it in a 4-bit register; the result was actually 0101 (+5). The minuend is 0011 (3) and the subtrahend is 1110 (14). But the largest positive signed number you can put in a 4-bit register is 7 — 1110 is actually -2. Hence, 3 – (-2) = 5.

PDF documents can be cumbersome to edit, especially when you need to change the text or sign a form. However, working with PDFs is made beyond-easy and highly productive with the right tool.

## How to Add Page Numbers To PDF with minimal effort on your side:

1. Add the document you want to edit — choose any convenient way to do so.
2. Type, replace, or delete text anywhere in your PDF.
3. Improve your text’s clarity by annotating it: add sticky notes, comments, or text blogs; black out or highlight the text.
4. Add fillable fields (name, date, signature, formulas, etc.) to collect information or signatures from the receiving parties quickly.
5. Assign each field to a specific recipient and set the filling order as you Add Page Numbers To PDF.
6. Prevent third parties from claiming credit for your document by adding a watermark.
8. Notarize documents online or submit your reports.
9. Save the completed document in any format you need.

The solution offers a vast space for experiments. Give it a try now and see for yourself. Add Page Numbers To PDF with ease and take advantage of the whole suite of editing features.

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