Date: Sun, 11 Dec 1994 19:28:48 PST From: Barbara Christensen 574-6560 Subject: Sideways Math I am a 4th grader at Laurel School in San Mateo and I want to see if you can solve this problem. One +One _______ Two
Date: Mon, 12 Dec 1994 14:27:27 +0000 From: Elizabeth Weber Subject: Re: Sideways Math Hello! If I understand your question, you're asking if I can find some numbers to put in for the letters in your problem. I always liked this kind of problem. If I say that e=1, when I add the ones digits, I find out that o=2. Then I put 2 in for the Os in the hundreds places, and when I add, I find out that T=4. n can be anything I want as long as 2 x n is a single digit number. I've already used the numbers 1, 2, and 4 in this problem, so I'm going to let n = 3. When I add the tens digits, I find out that w = 6. So the problem is: 231 +231 ---- 462 Here are some questions for you to think about: Can you figure out why 2 x n has to be a single digit number? What is the greatest number n could be? Can T be any number? Can you find the greatest number e could be? How many right answers are there to your problem? Thanks for writing to Dr. Math! Elizabeth, a math doctor
Search the Dr. Math Library:
Ask Dr. MathTM
© 1994- The Math Forum at NCTM. All rights reserved.