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Instructor Overview

Students determine how many times they would need to fill a quarter cup to measure the ingredients in a recipe.

Key Concepts

This lesson informally introduces the idea of dividing by a fraction. Students must figure out how many times a quarter cup must be filled to measure the ingredients in a recipe. This involves dividing each amount by 14. Here are some methods students might use:

  • Add 14 repeatedly until the sum is the desired amount. Count the number of 14s that were added.
  • Start with the amount in the recipe. Subtract 14 repeatedly until the difference is 0. Count the 14s that were subtracted.
  • Draw a model (e.g., a bar or a number line model) to represent the amount in the recipe. Divide it into fourths and count the number of fourths.

Goals and Learning Objectives

  • Learn how to divide by a fraction.