Sunday, March 10, 2013

Make it a Friendly Ten!


Make it friendly!  When you add two numbers, it is easy to make it a friendly ten.  Then, do your adding.  Let’s try this problem…
5 + 7 =
5 + 5 + 2 =
10 + 2 = 12
If you know that 7 is made up of 5 and 2, you can make a friendly ten (5 + 5), then add the 2.  Your answer is 12.

Our Math In Focus trainer was here for three days last week working with our classroom teachers, grades K-5.  We went to all of our six elementary schools where she did demonstration lessons, and the other teachers at that grade level viewed the lesson.  We had an opportunity to talk about the planning of the lesson prior to the demonstration lesson.  After the lesson, we had time to reflect and debrief, as well as ask questions, share what is working well and challenges.  

The first grade lesson, (thank you Glacier Valley for having us), was all about "making tens."  As this was a new concept for our first graders, the first step is to utilize concrete materials.  Children used a double ten frame and two colors markers working with addition problems such as 8 + 6 or 6 + 7.  The students are working on building conceptual understanding of making a friendly ten.

Wednesday, January 30, 2013

Mental Math - Near Doubles!

Once your child knows their doubles, they can use that and count up or down to solve a problem.

If 4 + 4 is 8, then 4 + 5 is 9 (count up by one).
If 4 + 4 is 8, then 4 + 3 is 7 (count down by one).

See how everything is related in math?  Helping break it down for your child helps them make sense of mathematics.  Try these great ideas to support your child as they work to understand doubles and near doubles.

NEAR DOUBLES IDEAS!


Friday, January 18, 2013

Mental Math - Doubles!

I love teaching children doubles.  They love it too!  Doubles are everywhere in real life.  Think about an egg carton, 6 + 6.  Think about the fingers on two hands, 5 + 5.  Think about a 16-pack of crayons, 8 + 8.   Once children see the pattern, they find doubles everywhere!

Practice in the car.  Practice on an airplane.  Practice as you go for a walk with your child.  Ask your child to explain how they figured out the answer.  Use a "million dollar question," and ask...
How do you know?
Are you sure?
Can you tell me more about how you figured that out?


Saturday, January 12, 2013

Mental Math - Adding Eight!


Does this sound familiar?  This is the same as working with nine from my December 13, 2012 posting...  almost!  

Make eight into a friendly ten, then add.  When you are done, take two away.

8 + 5 =  _____
Make 8 into a friendly 10 (8+2=10), then add your 5.
10 + 5 = 15  

Take two away now!
15 - 2 =  13
The answer is 13!

WE LOVE FRIENDLY TENS!