Showing posts with label rectangular modeling. Show all posts
Showing posts with label rectangular modeling. Show all posts
Saturday, June 13, 2009
Wednesday, June 10, 2009
Friday, June 5, 2009
Thursday, June 4, 2009
Thursday, May 28, 2009
Rectangular modeling problem involving "fractions of a remainder"
The trick to these "fraction of a remainder" rectangular modeling problems is to choose the correct number of squares to make up your original rectangle. Always choose the least common multiple of your denominators.
Wednesday, May 20, 2009
Word problem city!
Here we see word problems of varying degrees of challenge. Email me if the explanations are not clear enough.










Labels:
coin problem,
linear systems,
rectangular modeling,
Time
Tuesday, May 19, 2009
Saturday, May 16, 2009
A word problem involving Ratios and books.
The key to understanding this problem that was asked to the 9 year olds is a proper model. We use a rectangular modeling set up. In rectangular modeling we always use the smallest unit as the squares that make up the larger rectangles. In this case: Lina's original amount of books. Now, we must focus our attention on the fact that AFTER 24 books are purchased the amount Lina has is twice that of Suling. Suling had 2 rectangles in our original model. Hence Lina MUST have 4 rectangles in our new model as 4 is twice 2. we step back and look at the model. We notice that 3 small rectangles represent the 24 books. Hence the division.

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