Subtracting 999-100Date: Tue, 6 Dec 94 14:55:39 PST From: michael laue Subject: math Dear Dr. Math, My name is Michael Laue. I want to ask you a question -- it is what is the answer to this: 999-100? Date: Wed, 7 Dec 1994 00:06:55 -0500 (EST) From: Dr. Sydney Subject: Re: math Dear Michael, Hello there! Thanks for writing Dr. Math! To subtract numbers I find it easiest to write them on top of one another so that the right hand sides line up, like this: 999 -100 ------ Then you subtract as you would with simpler numbers, starting with the right side. 9 - 0 is 9, and 9 - 1 is 8, so you get: 999 -100 ---- 899 Does that make sense? You can always check your answer by adding the answer and the number being subtracted -- you should get the number from which you are subtracting. So check: is 899 + 100 = 999? I hope this helps. Write back if you have any other problems. Sydney |
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