Unit3Section8

Unit 3: Fractions and Decimals

Section 8: Representing, Comparing and Equivalence for fractions

Goals:

represent fractions using area, length, number line and discrete models
understand and compare sizes of fractions by relating them to unit fractions and benchmark numbers
write word problems for fraction addition
add fractions with like and unlike denominators using manipulatives and diagrams
know what a prime number is, and why 1 is not prime
understand factors and multiples, and find least common multiples and greatest common factors using lists and prime factorizations.

Fraction models and representations

Videos:

Different models for fractions (ways to approach the idea of fraction)
Representations of fractions (how to draw part-whole and repeated unit fractions)

Readings:

The main types of fraction representations and what they do best (follow all of the "next"s at the bottom of the pages.

Assignment 32:

Fraction representations July 16

Comparing fractions:

Exploration:

Do:

Fill out this exploration guide, using either fraction circle physical manipulatives you have cut out, or either the fraction circle or fraction bars applet (or some mixture of the two--experiment with the different representations to see what gives you the most useful insights). You may need wait a couple of minutes for the applets to start and/or reload the page.

Watch: My talking about the answers I "expect" you to get, and what good ways are of explaining them. Also hints
Assignment 33: Write up your exploration guide stuff more carefully, and submit it. July 17

Equivalent fractions:

Watch:

Fraction Circles and Paper Folding
Array and non-array representations

Read:

The Array Strategy
Child-Invented Strategies: Equal Sharing and the Roots of Fraction Equivalence (D2L->Content->Readings)

Watch: Simplification strategies revisited

Assignment 34: Explaining equivalent fractions July 17

Prime numbers: what they are; how to find prime factorizations

Exploration:

Watch: What to do with the web page
Do: See how well you can do with each of the applets on this page

Assignment 35: July 18 Prime numbers and factorizations

Prime factorizations and equivalent fractions

Watch: prime factorizations

prime factorizations and equivalent fractions
more about equivalent fractions
more about prime factorizations and equivalent fractions

Read: Divisibility rules (useful but optional) Bassarear section 4.1

Prime and composite numbers: Bassarear section 4.2

Assignment 36: July 18 prime factorizations and equivalent fractions

Factors and multiples: what is a factor, what is a multiple? How to find LCM and GCF two ways.

Watch: LCM, GCF
Read: Bassarear section 4.3
Assignment 37: Bassarear pg 252 # 6 b,c. Do each problem two ways: by writing lists, and by using a prime factorization. Do also pg 252 # 5, 7, 8, 9 (3rd Edition, pg 250) July 19