SALTA 4th grade

Numbers and Operations - Fractions

Core Guide

Grade 5

Suggested Models

Suggested Strategies

 Draw models to compare, and reason, about the size of products in relationships to the size of various factors.  Use area models to demonstrate the concept of scaling  Construct viable arguments and critique the reasoning of others about the size of a product compared to the size of one factor on the basis of the size of the other factor.  Use models and/or words to explain why multiplying a given number by a fraction greater than one results in a product greater than the given number  Use models and/or words to explain why multiplying a given number by a fraction less than one results in a product smaller than the given number  Work with multiplying by unit fractions

3 4 7 is less than 7 because 7 is multiplied by a factor less

Example:

than 1 so the product must be less than 7.

 7

 3/4 of 7

Image Source: http://www.dpi.state.nc.us/docs/curriculum/mathematics/scos/5.pdf

5.NF.5