I had several difficulties about helping my son with 2nd grade math facts. I had great help by Molly at http://homeschoolblogger.com/indexcards/, because she gave me some interesting suggestions to help my son in understanding subtraction regrouping. Please feel free to include your suggestions to help children with learning problems in understanding this concept. Thank you Molly!
Hi, Denise!
You posed a great question. One idea I could think of is to set up the problems with each number being a separate card. For instance, if you are going to have the problem: 26-17, you would need a 2, 6, 1, and 7 card. You would set up the 2 and 6 above the 1 and 7. As you are talking about each step, you can look at the 6 and the 7 and talk about the 7 being larger than the 6, so you would need to "borrow" from the 10s place.
One thing I would stress is the "why" to regroup. My son, just turned 9, was able to understand it better when he understood why he had to borrow from the next place over. You could even use the index cards to create a lapbook about regrouping. Each booklet could be a step in teaching why you would need to regroup the numbers when you subtract.
Please feel free to e-mail me again, if you have any additional questions. I will definitely try to help as much as I can!
Many Blessings,
Molly
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May. 26, 2007 - Untitled Comment