Friday, September 16, 2011

Numbers Great and Small

This week, Grade 5 began switching classes for Mathematics.  All four classes are now hard at work understanding the Base-10 number system while reading and writing numbers into the billions!  In PGRoom209, we're writing numbers instandard notation (123,456,789), word form (one hundred twenty-three million, four hundred fifty-six thousand, seven hundred eighty-nine), short-wordform (123 million, 456 thousand, 789), and expanded form (100,000,000 + 20,000,000 + 3,000,000 + 400,000 + 50,000 + 6,000 + 700 + 80 + 9).  Throughout all of our activities, we're focusing on the concepts of place value and the relationship of place values to one another.

    Next stop, decimals!  That's right, we've started extending our knowledge of whole number place value to decimal place values and finding out that we can use the same concepts and models.  Using the same familiar grids, Base-10 blocks, and number lines, we are taking the mystery out of the zone between 0 and 1.

Cross-posted on our new website: PGRoom209

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