1. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Planning healthy meals within a budget can save a lot of money. 1 lb versus 16 oz. Which weighs more?

2. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Lesson Objective Students will learn how to convert between common weights found on food packages in order to make better decision when comparing unit prices.

3. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Commonly Used Conversions

4. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Commonly Used Abbreviations

5. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts Luis is buying a can of tomatoes. The problem is that there are many different sized cans in the store and they are all labeled with different measures of weight. In order to know which has the better price, he has to convert them to the same measure. The first can he sees is 29 oz and the second can is 1 lb 12 oz. They both cost $3.25, so which is the better buy? Let’s find out…

6. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts The first can he sees is 29 oz and the second can is 1 lb 12 oz. They both cost $3.25, so which is the better buy? Remember…1 lb = 16 oz So lets convert both weights into ounces. The second can needs to go from pounds to ounces… Step 1Can 1 =29 oz

7. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts The first can he sees is 29 oz and the second can is 1 lb 12 oz. They both cost $3.25, so which is the better buy? Remember…1 lb = 16 oz So lets convert both weights into ounces. The second can needs to go from pounds to ounces… Step 1Can 1 =29 oz Step 2Can 2 =1 lb 12 oz =16 oz + 12 oz =28 oz

8. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts The first can he sees is 29 oz and the second can is 1 lb 12 oz. They both cost $3.25, so which is the better buy? Now compare the two weights; which is the better buy? Can 1=29 oz Can 2=28 oz

9. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts The first can he sees is 29 oz and the second can is 1 lb 12 oz. They both cost $3.25, so which is the better buy? Now compare the two weights; which is the better buy? Can 1=29 oz Can 2=28 oz

10. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts I can buy eggs for $1.50 per dozen or $7.00 for 5 dozen. Which should I buy?

11. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts I can buy eggs for $1.50 per dozen or $7.00 for 5 dozen. Which should I buy? ARE YOU SURE? Do we always buy the least expensive? How many eggs do I eat? How long do they last in the refrigerator? Not all decisions in life are straight forward cost evaluations. Think it through to make a wise decision!

12. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts I am having a party and will invite 100 people. How many 2 liter bottles of sodas should I buy so that everyone can have one 8 oz serving? Step 1 Convert the 2 liter bottles into 8 oz servings. 2 liters= 34 oz x 2 oz = 68 oz

13. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts I am having a party and will invite 100 people. How many 2 liter bottles of sodas should I buy so that everyone can have one 8 oz serving? Step 1 Convert the 2 liter bottles into 8 oz servings. 2 liters= 34 oz x 2 oz = 68 oz 2 liters= 8.5 servings 868

14. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts I am having a party and will invite 100 people. How many 2 liter bottles of sodas should I buy so that everyone can have one 8 oz serving? Step 2 Number of bottles required 2 liters= 8.5 servings 868 8.5100

15. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts I am having a party and will invite 100 people. How many 2 liter bottles of sodas should I buy so that everyone can have one 8 oz serving? 12 Bottles Step 2 Number of bottles required 2 liters= 8.5 servings 868 11.76 bottles 8.5100 Round Up

16. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts 1 serving of soda is 8oz. I can buy a 2 liter bottle for $1.00. A 2 liter bottle will serve about 8 people. I am having a party and will invite 100 people. So…how many soda’s will I buy? 12 bottles: that’s $12.00 ARE YOU SURE? What if someone wants more than just one cup of soda?

17. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Converting Weights and Amounts 1 serving of soda is 8oz. I can buy a 2 liter bottle for $1.00. A 2 liter bottle will serve about 8 people. I am having a party and will invite 100 people. So…how many soda’s will I buy? 12 bottles: that’s $12.00 ARE YOU SURE? What if someone wants more than just one cup of soda?

18. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Review: 1.How many ounces are in a pound? 2.If two cereal boxes both cost $1.00 but one is 18 oz and the other is 1 lb, which is the better buy?

19. Copyright 2014 © W. Seth Hunter ConsumerMath.org L5.3 Unit Conversion Review: 1.How many ounces are in a pound? 2.If two cereal boxes both cost $1.00 but one is 18 oz and the other is 1 lb, which is the better buy? 16 18 oz = 1 lb 2 oz = the better buy