Adding big numbers
Date: Tue, 6 Dec 94 11:37:05 PST From: matthew yarbrough Subject: math DEAR DR. MATH I wrote to you already but I forget what college you go to. What is 9,000,000,000,664,556,666,134,852,855,288 + 8,456,789,135,799,545,743,122,546,676,565,467? Matt Yarbrough
Date: Tue, 6 Dec 1994 15:32:12 -0500 (EST) Subject: Re: math From: Dr. Ken Hello there Matthew! The Math Doctors are all students at Swarthmore College in Swarthmore, Pennsylvania. Most of us are math majors. In response to your addition problem, here's how I would approach the problem. Write the numbers down so that one of them is on top of the other, and so they line up evenly on the right side, like this: 9,000,000,000,664,556,666,134,852,855,288 + 8,456,789,135,799,545,743,122,546,676,565,467 _________________________________________________ And then you add starting from the right side. If you've done any addition of smaller numbers before, you should be able to do this one, too. I'll get you started, and then see if you can finish the problem! 1 11 11 9,000,000,000,664,556,666,134,852,855,288 + 8,456,789,135,799,545,743,122,546,676,565,467 _________________________________________________ 420,755 Do you see how that works? The tricky part comes when you have to carry the ones; that's when you get those 1's up on top of the first number. Adding big numbers isn't really any harder than adding smaller numbers; it just takes a while longer. If you have trouble seeing how to continue, write us back, and we'll help you out! -Ken "Dr." Math
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