Monday, 3 November 2014

Power of Nine!

Following the success of our first two Math Strategies - Rainbow Numbers (that make 10) and Doubles/Near Doubles, our next focus will be on numbers added to nine and when 9 is taken away from a number.  This is a cute video that helps explain the strategy:

Here is another one by Classroom Professor that helps explain the strategy to parents.

For those who have these facts memorized, the next step will be mentally adding a 2 or 3 digit number with 9 like 45 + 9 and 9 + 123.

Don't forget to turn around the practice and subtract too.  15 - 9,  13 - 9 as well as 13 - 4 and 17 - 8.  We call it "The Power of Nine" and make a muscle to show the power that number has!

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