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Week of November 19 - Class notes for the week of November...

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H a l f A d d e r A S u m B C a r r y o u t F u l l A d d e r B A C a r r y o u t S u m C a r r y i n Class notes for the week of November 19 th Addition: Adding two decimal numbers is easy: 586 +267 853 We add starting with the rightmost column. In this case we add 6 and 7 to get 13. We don’t write the 13 down on the bottom row though, instead we write the 3 down and carry the 1 to the next column. If we show all the carries we get 11 586 +267 853 There is never a carry into the first column. In this first column we only add two digits, one from each of the two numbers. In the subsequent columns we may need to add three digits one from each of the two numbers, and another from the carry digit. Binary adders: The situation is similar when adding binary numbers; there are only two digits in the
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