Texas Instruments TI-34 II Teachers Guide - Page 35

My Favorite Recipe-Fractions (Continued) Activity Present the following problem to students: You are about to make your favorite cookie recipe. You check the bowls in the kitchen and the only one you can find is a 5-quart bowl. Will you be able to make the cookies in that bowl? Here is the recipe: 2 1/4 cups brown sugar 2 1/2 cups white sugar 1 1/2 cups butter 3/4 cups shortening 5 eggs 1 teaspoon salt 2 teaspoons baking powder 2 teaspoons baking soda 1 teaspoon vanilla 4 1/3 cups flour 5 3/8 cups oatmeal What is the total volume of the recipe ingredients in cups? In quarts? Procedure 1. Before starting on the problem, have the students look at the recipe to find ingredients where the measurement is not given in cups, and prepare them to convert these measurements into cups. Teaspoon measures: total = 6 tsp. = 2 T. = 1/8 C. 5 eggs = 1 ¼ C. 2. Using the TI-34 Ö, find the total volume of the recipe ingredients in cups. 18 1/12 cups 3. Next, convert the total number of cups into quarts. 4 25/48 4. Would the ingredients fit in the 5-quart bowl? Yes Extension Ask the students to find other recipes at home and add up the list of ingredients to determine how large the bowl would need to be. © 1999 TEXAS INSTRUMENTS INCORPORATED TI-34 Û: A Guide for Teachers 29