Abbeygurl4 Posted December 15, 2010 Share Posted December 15, 2010 multiplication, but can figure out percentages in his head? We've used MUS, Teaching Textbooks and watched Khan Academy videos over and over. What am I doing wrong?? Why can't he understand how to multiply 325 x 12? Quote Link to comment Share on other sites More sharing options...
forty-two Posted December 15, 2010 Share Posted December 15, 2010 What sort of mistakes is he making? Could you post a problem or two he did wrong, including all the work he did - there are so many ways to get things wrong, it helps to know the particular mistakes in order to figure out the cause. Quote Link to comment Share on other sites More sharing options...
Abbeygurl4 Posted December 15, 2010 Author Share Posted December 15, 2010 ummm .... He gets stuck when he carries a number. If the problem was 532 x 26 -------- he would multiply 6 x 2, put the 2 down and not know where the 1 goes. I've had him use notebook paper turned sideways so he has columns, which helps a little. The blocks used with MUS just confused both of us. How do I know which math curriculum would be best for him? Khan Academy videos help, but he needs an actual curriculum that makes sense to both of us Quote Link to comment Share on other sites More sharing options...
Abbeygurl4 Posted December 15, 2010 Author Share Posted December 15, 2010 that was supposed to be 532 x 26 Quote Link to comment Share on other sites More sharing options...
Abbeygurl4 Posted December 15, 2010 Author Share Posted December 15, 2010 I don't know why when I type the problem, it moves over a digit when I post it. Quote Link to comment Share on other sites More sharing options...
forty-two Posted December 15, 2010 Share Posted December 15, 2010 A couple thoughts: Can he carry in addition? Because it's basically the same principle, and pretty much the same procedure - put extra tens over the tens place, extra hundreds over the hundreds place, etc. Can/could he do multiplication without carrying? Like this: __532 x__26 ___12 => 2x6 __180 => 30x6 _3000 => 500x6 ___40 => 2x20 __600 => 30x20 10000 => 500x20 13832 (hope that's right, did it really quick, no checking :tongue_smilie:) Might show if it's a place value issue, or just a keeping the numbers straight issue. Quote Link to comment Share on other sites More sharing options...
forty-two Posted December 15, 2010 Share Posted December 15, 2010 Also, wrt finding a curriculum that you both understand, I'd figure out which ones make sense to *you*, and then let him pick from those. You've said that neither MUS nor TT have worked out. You mentioned the blocks in MUS confused you both, but what were the problems with TT? Also, did you like how *you* learned math as a child - if so, maybe you could describe what you liked about it and the Hive could see what programs are similar. And if you *didn't* like how you learned as a child, what didn't you like about it? And do *you* feel confident about teaching math and your math education in general, or is it a weak area? Quote Link to comment Share on other sites More sharing options...
wapiti Posted December 15, 2010 Share Posted December 15, 2010 (edited) Here is a sample lesson from MM, though I suspect there may be valuable applicable stuff that comes before it in the Multiplication 2 booklet. http://www.mathmammoth.com/preview/Multiplication_2_Multiplying_3digit_by_2digit_Number.pdf (or maybe have him look at multiplying 2 digits x 1 digit first http://www.mathmammoth.com/preview/Multiplication_2_Multiply_Columns_Standard_Way.pdf) and the corresponding MM video http://www.youtube.com/mathmammoth#p/u/16/dDQSzMEKfYs (if this turns out to be helpful, please let me know, as I am heavily leaning toward purchasing MM but I'm having cold feet) Edited December 15, 2010 by wapiti Quote Link to comment Share on other sites More sharing options...
wapiti Posted December 15, 2010 Share Posted December 15, 2010 ummm .... He gets stuck when he carries a number. If the problem was 532 x 26 -------- he would multiply 6 x 2, put the 2 down and not know where the 1 goes. I've had him use notebook paper turned sideways so he has columns, which helps a little. The blocks used with MUS just confused both of us. How do I know which math curriculum would be best for him? Khan Academy videos help, but he needs an actual curriculum that makes sense to both of us Most math curricula seem to carry the 1 above the next digit to be multiplied in the problem itself. In contrast, I was taught to carry the 1 above the blank space where I was going to write the next digit of a product, that the 1 was added into (does that make any sense? it's hard to describe). I always thought my way makes more sense :D, though I haven't been able to convince any of my kids yet. Quote Link to comment Share on other sites More sharing options...
Crimson Wife Posted December 15, 2010 Share Posted December 15, 2010 if this turns out to be helpful, please let me know, as I am heavily leaning toward purchasing MM but I'm having cold feet The single-topic "blue" Multiplication 2 worktext is awesome! I bought it after looking through Singapore 3A and the HIG & realizing there was no way in heck my DD was going to be able to make all the conceptual leaps required. Maria Miller's explanations are superb and I really liked how she breaks it down step-by-step-by-step for the student. She takes the child in gradually rather than Singapore's approach of simply tossing him/her into the deep end of the pool. Quote Link to comment Share on other sites More sharing options...
Sebastian (a lady) Posted December 16, 2010 Share Posted December 16, 2010 ummm .... He gets stuck when he carries a number. If the problem was 532 x 26 -------- he would multiply 6 x 2, put the 2 down and not know where the 1 goes. I've had him use notebook paper turned sideways so he has columns, which helps a little. The blocks used with MUS just confused both of us. How do I know which math curriculum would be best for him? Khan Academy videos help, but he needs an actual curriculum that makes sense to both of us When my kids learned multiplication of double digit numbers, the book emphasized that they were multiplying times ones then times tens. It had expanded notation that looked something like 532 = 500 + 30 + 2 and 26 = 20 + 6 I think the multiplication would have been written: (500x20 + 30x20 + 2x20) + (500x6 + 30x6 + 2x6)= (10000 + 600 + 40) + (3000 + 180 + 12)= 10640 + 3192 = 13832= What you might want to do is back up to problems like 532 x 6 = 500x6 + 30x6 + 2x6= for a while to help him remember what the algorithm represents. Quote Link to comment Share on other sites More sharing options...
Corraleno Posted December 16, 2010 Share Posted December 16, 2010 Maria Miller's explanations are superb and I really liked how she breaks it down step-by-step-by-step for the student. She takes the child in gradually rather than Singapore's approach of simply tossing him/her into the deep end of the pool. :iagree: Maria Miller is absolutely brilliant at explaining complex math concepts in a way that kids totally get, without either dumbing them down or forcing kids to "connect the dots" themselves. Jackie Quote Link to comment Share on other sites More sharing options...
Abbeygurl4 Posted December 16, 2010 Author Share Posted December 16, 2010 As far as TT goes, I liked it and my son liked it but he didn't retain anything he learned. I do not feel comfortable teaching math. I learned multiplication of multi-digit numbers the old fashioned way and it didn't seem very difficult to me, carrying numbers was easy and I'm not that great at math so I don't understand why my ds has problems. He is actually starting to get it because I've been making him watch the Khan Academy videos over and over and work the problems. I need a curriculum with plenty of repetition and I need videos or a really clear explanation of how I'm supposed to teach each concept. Would Khan Academy videos and MM work together? Quote Link to comment Share on other sites More sharing options...
Corraleno Posted December 16, 2010 Share Posted December 16, 2010 Maria Miller has some of her own videos on youtube as well. Jackie Quote Link to comment Share on other sites More sharing options...
Abbeygurl4 Posted December 16, 2010 Author Share Posted December 16, 2010 Maria Miller has some of her own videos on youtube as well. Jackie Thank you! I didn't know she had videos! Quote Link to comment Share on other sites More sharing options...
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