Julie in Austin Posted January 3, 2011 Share Posted January 3, 2011 1. Can someone give me an example of a word problem involving the multiplication of two negative numbers? 2. I have to do the "make a model" activity with about 5 Tiger Cubs next week. I am sick of little wood models that you buy and the kids nail together (POUND POUND POUND) and then paint (dripping paint in car on the way home . . .). The model can be anything--wood, paper, clay, etc. Anyone have any interesting ideas for me? They have about an hour to do the project. Quote Link to comment Share on other sites More sharing options...
AngieW in Texas Posted January 3, 2011 Share Posted January 3, 2011 (edited) If you owe $5 to two people, that would be the equivalent of having 2 x -5. If you are forgiven a debt of $5 to two people, that would be equivalent of having -2 x -5. That's the best example I can come up with for a multiplication problem with two negative numbers. No ideas on the model thing. I just googled and found this webpage with some word problem examples of multiplying with negative numbers: http://mathforum.org/library/drmath/view/57865.html Edited January 3, 2011 by AngieW in Texas Quote Link to comment Share on other sites More sharing options...
Dana Posted January 3, 2011 Share Posted January 3, 2011 1. Can someone give me an example of a word problem involving the multiplication of two negative numbers? It's not great, since I generally show how multiplication works, then the word problems involve numbers that are negative, but I can't think of any in texts that just have two numbers (and not algebraic expressions), but here's an attempt.... You spend $5 each day. How much did you have 4 days ago? So ($ spent)*(# days) = (-5)(-4) = 20 Quote Link to comment Share on other sites More sharing options...
Dobela Posted January 3, 2011 Share Posted January 3, 2011 When my brother was a scout they sometimes did things like lace together pieces of leather to make a pouch or once they did a small macrame project (can't remember what it was) as a way to practice knots. No help on the math... Quote Link to comment Share on other sites More sharing options...
Jen500 Posted January 3, 2011 Share Posted January 3, 2011 My dc have made popsicle stick catapults from this website-- http://www.stormthecastle.com/catapult/index.htm No hammers or nails needed. :) Quote Link to comment Share on other sites More sharing options...
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