

Walking Bob Elite user 489 Posts 
My daughter came home with what I think is a pretty tough math assignment. It may take some magic to solve but I though maybe someone would have some ideas.
She needs to make a true subtraction problem using the numbers 1  9. All numbers must be used and can be used only once. Sample give was 486 359 _________ 127 Any help or ideas would be appreciated. She needs 15 examples. Thanks and have a nice day, Walking Bob in Iowa 
Scott Cram Inner circle 2677 Posts 
If she's allowed to get creative, how about:
Code:
.486 <br>.359 <br> <br> .127 Code:
4.86 <br>3.59 <br> <br> 1.27 Code:
48.6 <br>35.9 <br> <br> 12.7 BTW, if you have Martin Gardner's 3rd book, New Mathematical Diversions, check out Chapter 19 ("Nine More Problems"), where approaches to a similar problem are discussed in detail. There are some solutions discussed in that article, including: Code:
972 <br>654 <br> <br> 318 and Code:
567 <br>438 <br> <br> 129 Heck, if you want a computer to solve it for you, go to the Alphametics Puzzle Solver, and type in for the summand words: ABC DEF For the sum word enter: GHK You'll get the answers as addition problems, but that's easily turned around to a subtraction problem. Also, some of the solutions presented will use a 0, and that sounds like it's not allowed in the assigned problem, so make sure to skip those. 
Walking Bob Elite user 489 Posts 
Thanks Scott for the ways to solve this problem.
Walking Bob 
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