1. Unit Multipliers

2. Review: Writing any whole number as a fraction while still retaining its value: How do we write 4 as a fraction? – 4/1 – A number can be changed into a fraction and still keep its value by placing 1 as the denominator. How do we write 1 as a fraction? – Many ways, 1/1, 2/2, 84/84.

3. Unit Multipliers Unit multipliers are fractions that equal 1. The difference between ordinary fractions that equal one and unit multipliers is that unit multipliers require units. What do I mean by units? – units of measure such as feet, inches, millimeters, centimeters,....

4. Unit Multipliers Here are a couple of unit multipliers that equal 1: Do you see why they both equal 1? Hint: 12 inches = 1 foot and 1 foot = 12 inches

5. Unit Multipliers Change 5.5 ft to inches ①Write the given as a fraction ①Think about the unit multipliers you can use ①Choose which unit multiplier to use The one that has the same unit in the denominator as the given has in the numerator ①Multiply

6. Unit Multipliers Used to change the units of a number. – If we multiply a fraction by a number that has a value of 1, we do not change the value of the number, Just change the numeral we use to represent the number.

7. Unit Multipliers Convert 42 meters to centimeters. Convert 20 inches to centimeters. Use two unit multipliers to convert 25 feet to centimeters. (feet to inches to centimeters)

8. Homework Lesson 4 Packet