June 16, 2009

This lesson will give students a chance to build proficiency with one-half.<p/> <b><p>This resource is part of the <a href="http://www.curriki.org/xwiki/bin/view/Coll_melissawebber/FunwithFractions">Fun with Fractions</a> collection.</p></b>

- Mathematics > General
- Mathematics > Number Sense & Operations

- Grade 1
- Grade 2
- K

Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.

Understand two fractions as equivalent (equal) if they are the same size, or the same point on a number line.

Recognize and generate simple equivalent fractions, e.g., 1/2 = 2/4, 4/6 = 2/3). Explain why the fractions are equivalent, e.g., by using a visual fraction model.

Compare two fractions with the same numerator or the same denominator by reasoning about their size. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with the symbols >, =, or

Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions.