The Price of Bird Seed

Posted: November 6, 2014 in Periods 1&2, Periods 3&4

Bob sells five pounds for $8.00 and he charges the same rate no matter how much you buy-there are no discounts for large quantities.

Packages come in the following weights:

  • 1/4 lbs
  • 3/4 lbs
  • 1 lbs
  • 2 lbs
  • 3 lbs
  • 4 lbs
  • 5 lbs
  • 8 lbs
  • 13 lbs
  • 21 lbs
  • 34 lbs
  • 90 lbs

Make a chart to help customers know how much they will spend.


 Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities.


 Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship.


 Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.


 Make tables of equivalent ratios relating quantities with whole-number measurements, find missing values in the tables, and plot the pairs of values on the coordinate plane. Use tables to compare ratios.


Solve unit rate problems including those involving unit pricing and constant speed.


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