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Comment on Multiplying Integers: Why is -3 x -4 = +12? by 3 keys to a flipped classroom - Teachers with Apps
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-870
Sat, 06 Oct 2012 13:36:23 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-870[…] on how to follow an algorithm or are they learning why that algorithm works? Here is a small example to illustrate my point: I can give students the ‘rules’ for multiplying positive and negative […]
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Comment on Multiplying Integers: Why is -3 x -4 = +12? by Rich
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-864
Sat, 01 Sep 2012 07:08:34 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-864I am still having difficulties with a negative times a negative concept that the first – means something different than the second -. I look forward to hearing your comments
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Comment on Multiplying Integers: Why is -3 x -4 = +12? by David Truss :: Pair-a-dimes for Your Thoughts » The Stickiness Factor
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-756
Thu, 08 Mar 2012 23:28:00 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-756[…] first teach the concept of zero, then addition of integers, then subtraction, before moving on to multiplication and division… in this case, multiplication of integers was where the class was, but I would […]
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Comment on Multiplying Integers: Why is -3 x -4 = +12? by 3 keys to a flipped classroom | Connected Principals
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-641
Sun, 24 Apr 2011 08:36:54 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-641[…] on how to follow an algorithm or are they learning why that algorithm works? Here is a small example to illustrate my point: I can give students the ‘rules’ for multiplying positive and […]
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Comment on Multiplying Integers: Why is -3 x -4 = +12? by Tiffany
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-636
Thu, 14 Apr 2011 20:04:19 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-636Why must we start with zero though? I know that everything starts out as nothing, but then I’m thinking why can’t I do it without zero. When you do do it without zero you get the wrong answer.
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Comment on Multiplying Integers: Why is -3 x -4 = +12? by sadai
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-603
Tue, 23 Nov 2010 19:11:53 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-603math is hard and i really nead healp
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Comment on Numeracy Task 2 – Flipping Hidden Cups by David Truss :: Pair-a-dimes for Your Thoughts » Numeracy & Problem Solving: Process Producibles
https://datruss.wordpress.com/2007/01/27/numeracy-task-2-flipping-hidden-cups/#comment-602
Tue, 09 Nov 2010 14:34:26 +0000http://datruss.wordpress.com/2007/01/27/numeracy-task-2-flipping-hidden-cups/#comment-602[…] this with my class the following week and even tried out the (much more difficult to explain) 2nd task the week after that. I also attempted to try one of the approaches. For the second task: I took […]
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Comment on Multiplying Integers: Why is -3 x -4 = +12? by David Truss :: Pair-a-dimes for Your Thoughts » Assessment & Rote Learning: Math Conundrums
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-601
Tue, 09 Nov 2010 13:35:28 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-601[…] Example: When multiplying integers I teach the ‘rules’, the algorithm, but I also teach ‘Why?’. A student who has rote understanding of their times tables will see within my Multiplying Integers lessons that multiplication is repeated addition… a student lacking basic multiplication skills usually cannot go beyond the ‘rules’ since the multiplication itself is a neuron-taxing challenge to them. You need an understanding of basic skills before you can move on to more challenging tasks. […]
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Comment on Multiplying Integers: Why is -3 x -4 = +12? by Mary
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-590
Mon, 21 Jun 2010 15:59:53 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-590It’s wonderful that you focus on the “why” in addition to the “how” of integer multiplication. It’s so important to help students understand the meaning behind the rules. This can be quite challenging with multiplying integers, but your counter model definitely helps. For reinforcement try this online counter model interactive applet (virtual manipulative): http://www.brainingcamp.com/resources/math/integer-multiplication/interactive.php
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Comment on Multiplying Integers: Why is -3 x -4 = +12? by Ghea Nurkartika Sari
https://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-583
Mon, 14 Dec 2009 03:40:16 +0000http://datruss.wordpress.com/2007/03/24/multiplying-integers-why-is-3-x-4-12/#comment-583Could you help me?
I have home work from my teacher. he talked to me to answer
the question, why 3 x 4 = +12 is and why 3 x 4 = -12 is.
please halp me. . .
.sS’^_^’Ss.
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