Monday, September 24, 2012

Give and Take

In my previous post, I discussed different ways of teaching addition with regrouping. One strategy I teach is the Give and Take Method. It allows students to completely avoid regrouping by getting one of the addends to the nearest ten. And whatever they give they have to take from the other addend.

The first step is to look in the ones place. Decide which digit is closer to a ten. In the example, it is the 8. What do you add to 8 to get it to the next tens number? 2. If you add 2 to the 8, then you have to take 2 from the 4. Now look at your new problem. You can solve it without regrouping. The method works really well with 2 digit numbers. I use it with kids who have trouble remembering to regroup or add in the ten that was regrouped. I also use it as a way to check problems that have been worked out using a different strategy. Plus, it gives kids extra practice with addition and allows some practice with mental math. After a while, many use this method to work problems out in their heads.

To introduce and review tens bonds, I show the following video. It is a favorite of my students! We watch it over and over again. It warms them up for this strategy and makes it so much easier. Check it out!

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