Lovedtodeath Posted September 27, 2012 Share Posted September 27, 2012 We are on to division and M still forgets that the top number needs to be bigger in long subtraction! Any videos, catchphrases, ideas? Thank you. Quote Link to comment Share on other sites More sharing options...
wapiti Posted September 27, 2012 Share Posted September 27, 2012 I agree, add a manipulative. Maybe this video? http://www.educationunboxed.com/explaining_the_subtraction_algorithm.html Quote Link to comment Share on other sites More sharing options...
stripe Posted September 27, 2012 Share Posted September 27, 2012 (edited) oops never mind, I missed the division part Edited September 28, 2012 by stripe Quote Link to comment Share on other sites More sharing options...
Lovedtodeath Posted September 27, 2012 Author Share Posted September 27, 2012 Thanks for all of your help! Quote Link to comment Share on other sites More sharing options...
Mrs Twain Posted September 27, 2012 Share Posted September 27, 2012 I told my son that the top number needs to fight the bottom number. If the top number is not strong enough, he needs to get help from the guy next to him. My son got it right away. Quote Link to comment Share on other sites More sharing options...
kalanamak Posted September 28, 2012 Share Posted September 28, 2012 We are on to division and M still forgets that the top number needs to be bigger in long subtraction! On an abacus, I would put 8 beads to one side. "Can you find a [group of] seven hiding in that?" He would move seven aside. "And how many are left?" Again with 8. "How many groups of three are hiding in that?" Etc. Then do it with dice, then with written numbers. This was both an intro to division and subtractability. Quote Link to comment Share on other sites More sharing options...
Mandamom Posted September 28, 2012 Share Posted September 28, 2012 More on the top, don't stop. More on the floor, go next door. I tell my students to say each number before deciding until it becomes more automatic. Quote Link to comment Share on other sites More sharing options...
redsquirrel Posted September 28, 2012 Share Posted September 28, 2012 Well, I almost hate to suggest it, because I had a kid who did not do well with 'borrow' as a phrase...but I know in the local ps they teach the kids "Bigger Bottom Borrow" as a catch phrase. Some kids do fine with the phrase 'borrowing' instead of 'regrouping' and if so, this can be a nice reminder. But, do start with manipulatives first. Quote Link to comment Share on other sites More sharing options...
Lovedtodeath Posted September 28, 2012 Author Share Posted September 28, 2012 More on the top, don't stop. More on the floor, go next door. That was the one I was trying to remember!:) I do have an abacus too. Kalanamak. Thank you! Quote Link to comment Share on other sites More sharing options...
SilverMoon Posted September 28, 2012 Share Posted September 28, 2012 Legos. Collect a pile of 2x2 bricks to make stacks of tens with. Keep about twenty loose for the "ones." Have him act out every single problem until it's automatic, and he can explain why in his own words. :) Quote Link to comment Share on other sites More sharing options...
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