We have added place value activities in with he 100's Chart things we have been playing with. If you missed the 100's Chart activities and printables you can find them here.
Every morning the kids do place value, with their number of the day, in their calendar notebooks. This was a good introduction for them, but now they need a deeper understanding.
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Luke is learning to add 2 digit numbers that require regrouping. I am not a lover of regrouping the way I learned it in school - carrying. I am going to teach the kids how to do this (my way), but I want them to really master it in the expanded form, left-to-right, get an initial estimate of the answer and then figure out the details. That right-to-left carrying is so easy for kids to come up with an answer that is not even in the ballpark of correct if they add one thing wrong. I personally do not know too many 6 year olds who stop and check their answer to see if it makes sense. Only in our Momma dreams! I will be mean and teach them the looooong way of doing it, but in the end it will be much simpler and eliminate many of the simple mistakes.
There are many manipulatives you can use to teach place value and regrouping.
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| Cuisenaire Rids |
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| Unifix cubes |
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| Base ten blocks |
And we can't leave out the nearly free homemade bean sticks. We had fun making these last year.
No need to get too crafty on a mat for any of them. I just draw a line down the middle of a paper and write ones on the right side and tens on the left. You could laminate it if you want to keep one around a while.
Here is how I am teaching Luke regrouping with double digit addition right now. This is solely to go along with the math program we are reviewing.
He understands it now that we have done many problems. We did it only with blocks first for a bit (the easy part), then added in working it on paper. I make him tell me every step he has to do before he does it so he understands why he is doing what he is doing.
This method seemed to work well for him. Once he can repeat it many times with no prompting, I will call it good and move on to expanded form. I think after doing this, the expanded form way will be easier. Load up that tool belt as full as you can. That is my moto!
Happy regrouping!
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My son had so much fun when he made bean sticks, too. Thanks for sharing these ideas as he is learning this concept now.
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