Division in fraction
- Grouping meaning (e.g. in 12, how many groups of 4 are there?)
- Sharing meaning (e.g. 12 is equally shared among 3)
The condition for division in fraction is, the unit must be the same with that grouping.
e.g.
...Fractions seems to be easier after this lesson... :D
George Pick's Theorem
First, we were asked to draw as many different sizes square on the dots diagram. I was only able to come up with 6 different squares. When our classmate shared their no. 7 square, I began to see from another perspective!
After which, we had to calculate the area of those squares. It is interesting that we can find out the answers by dividing the square up, moving and joining them back so we can see a unit easily.
Following, we had to come up with a shape (any kind) that uses only 4 dots. The class came up with many different ones (polygon); some were big, some were small. We proceeded to calculate the area of those polygons - which is not easy at all!
... and...someone save the day!!
*Thumps up* to my classmate who figure out the formula!
Area = (p + i) -3
Writing it out allowed me to see the pattern clearly :) The formula makes calculating of those polygons so much easier :D
No comments:
Post a Comment