This past week, we worked with fractions as part of a set and part of a whole. This week it gets a little trickier when we start to find fractions on number lines and in story problems where they are added and subtracted. Here's an example of where we are headed:
Hopefully, you picked 'C'.
Doesn't seem so tricky, does it? But as 3rd graders who may still be in Concrete-Operational phase of development (a fancy way of saying that they still need to see, touch, feel, to comprehend) these two amounts are not equal. It's like seeing a tall, skinny glass of lemonade and and short fat one. They think the tall one has more, regardless of whether or not it actually does- just because of it's appearance. This problem is an example of understanding: When the whole is the same- equal fractions are the same as well. So, a half is still a half, as long as the whole is the same. If a gallon of milk is in a gallon container, or in 2 half gallons, it is still a gallon of milk.... Fractions and numberlines
This is one part of how we are going to learn about fractions on number lines, and the next picture is about why!
Yes, we are going to be able to understand that wholes are in fractions on the number line as well.
Want some games to help practice?
This one is for later in the week:
https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/understanding-fractions-pre-alg/e/fractions_on_the_number_line_1
A great practice at home is to put multiple halves together and find out how many there are total. For example
Practice is what it's all about: but practice correctly!
Thanks! Mrs. Froehling
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AuthorHi, I'm Cheri Froehling, one of the learners in our class! I am also known as the Teacher, but in our class, all of us are learners AND teachers. We are rocking 3rd Grade! Archives
April 2017
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