Introduction
Attention! Attention! The 5th grade students will be hosting their very first bake sale this weekend in order to raise money for upcoming field trips. I am looking forward to all of the yummy treats each student will cook up! In order to bake we will need to know how to multiply fractions by whole numbers so we can make plenty of delicious treats!
Task
Over the next few days, we will learn how to multiply fractions by whole numbers. You will use the resources I provide you in this WebQuest in order to complete this task. Once you feel comfortable multiplying fractions by whole numbers, you will choose your favorite recipe below. If you would like to choose a different recipe please get permission first! In order to make enough for our bake sale, you will have to double the recipe. Doubling the recipe means to make two of it. You will record the new measurements of your ingredients in your math journal. I will provide you an online template to assist you in recording all of your ingredients. At the end, every student in class will have the option of baking your recipes and bringing them to school. Each student will present their doubled recipe to the class.
Process
Steps to Follow:
1. First you will need to watch the video on how to muliply fractions by whole numbers. This video will show you the step by step process on how to multiply fractions and whole numbers so you can double your recipe. Watch the video a few times until you feel comfortable.
Next, watch these short videos to refresh your memory!
Improper Fractions to Mixed Numbers
Mixed Numbers into Improper Fractions
2. Time to practice multiplying fractions by whole numbers. Use the links below to help you! These websites are fun and interactive! These are excellent resources to help you master the skill!
3. At this point, you have watched the lesson and practiced multiplying fractions by whole numbers. Now it's time to bake! You are going to choose a recipe of your choice, or you can use one that is below. Your task is to double the recipe (multiply each ingredient by 2). Make sure you record your new measurements/recipe on a separate sheet of paper. Below I have provided you a sample of how your paper should be set up. I will be collecting your recipes when you are finished.
Recipe Resources:
Sample Paper Set Up
Name: __________________________ Date:_______________
Name of Recipe:_________________________________
Name of Ingredient: ______________________
Original Ingredient Amount: ________________
Doubled Ingredient Amount:________________
Show Work:
Name of Ingredient: ______________________
Original Ingredient Amount: ________________
Doubled Ingredient Amount:________________
Show Work:
Name of Ingredient: ______________________
Original Ingredient Amount: ________________
Doubled Ingredient Amount:________________
Show Work:
4. When you have completed doubling your recipe, you have the option to go home and bake your yummy treats. When you enter math tomorrow you will be completing your post-assessment to show me your new knowledge of multiplying fractions by whole numbers.
Evaluation
| Score |
Beginning (1) |
Developing (2) |
Target (3) |
Your Score |
| Task |
Little to no understanding of multiplying a fraction by a whole number. |
Student multiplied a fraction by whole numbers, but only doubled some of the ingredients correctly. | Student mastered multiplying fractions by whole numbers and doubled all ingredients correctly. | |
| Process | Little to no work is shown. Student does not know where to begin when multiplying fractions with a whole number. | Work is shown throughout the equation. Student demonstrates most of the process but is unclear about a step. | Student understands the whole process of multiplying fractions by whole numbers. All the correct steps are present. | |
| Post-Assessment |
Student struggles to multiply fraction by whole numbers. Answers are not in simplest form. (1-2 correct out of 5) |
Student multplies fractions by whole numbers but has errors in the process. Most answers are in simplest form. (3-4 correct out of 5) |
Student shows mastery when multiplying fractions by whole numbers. Answers are in simplest form. (5 correct out of 5) |
Conclusion
By completing this task you have learned how to multiply fractions by whole numbers. It is important to understand how to multiply fractions for everyday life skills like baking and cooking!
Extension Activity Challenge: The principal loved your cookies and would like for you to make enough for the whole school. Each batch of your cookies can make 15 cookies. You will need to make 606 cookies in order to give each students in the school a cookie. How many full batches of your recipe will you need to make in order to feed every student? How many cookies will be left over after feeding every student? How many of each ingredient will you need in order to make enough cookies for all students in your school?
Good Luck! I challenge you!