Five from Twenty-fiveDate: 07/22/97 at 16:56:05 From: Chris Subject: Division How many times can you take 5 away from 25? Chris! Date: 07/28/97 at 10:27:01 From: Doctor Rob Subject: Re: Division Answer 1: You can take 5 away from 25 as many times as you like, but you will always get an answer of 20: 25 - 5 = 20 25 - 5 = 20 25 - 5 = 20 ... Answer 2: You can take 5 away from 25 as many times as you like: 25 - 5 - 5 - ... - 5 = ??. If the number of 5's is more that 5, the answer will be negative. Answer 3: You can only take 5 away from 25 once. That leaves you with 2, from which you can't take a 5 away. Or, if what you want to do is to keep subtracting 5 from 25 until you get to 0: 25 - 5 = 20 20 - 5 = 15 15 - 5 = 10 10 - 5 = 5 5 - 5 = 0 That's 5 subtractions, which shows you that there are five 5's in 25 and that 25 divided by 5 is 5. -Doctors Rob and Sarah, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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