1. Course 1 A black bear is about 5 ft long. An Alaskan brown bear is about 7 ft tall. How much taller is an Alaskan brown bear than a black bear? Subtracting Mixed Numbers LESSON 5-5 1414 1212 Subtract the whole numbers. Then subtract the fractions. 2 1414 To calculate the difference in heights, find 7 – 5. 1414 1212 An Alaskan brown bear is 2 ft taller than a black bear. 1414 Check for Reasonableness Round each mixed number: 7 8; 5 5. Then subtract: 8 – 5 = 3. The answer 2 is close to the estimate. So, the answer is reasonable. 1414 1212 1414 – The LCD is 4. Write as. 7 5 1212 1212 1414 – 7 5 2424 1414 2424 Additional Examples

2. Course 1 Subtracting Mixed Numbers LESSON 5-5 Find 9 – 1. 2323 Write 9 as a mixed number. Use 3 for the denominator since you must subtract. 2323 3333 9 8 Rename 9 as 8 + 1 = 8 +, or 8. 3333 3333 2323 – 1 2323 Then subtract the fractions. 1313 7 Subtract the whole numbers. – 1 Additional Examples

3. Course 1 Subtracting Mixed Numbers LESSON 5-5 A two-week-old panda bear weighed pound. At age one month, the cub weighed 2 pounds. How many pounds did it gain? 3434 11 20 1 Subtract. 3 10 Check for Reasonableness The answer 1 is close to the estimate of 1. 11 20 The panda bear gained 1 pounds. 11 20 3434 15 20 – The LCD is 20. Write as. 3434 15 20 The LCD is 20. Write as. 26 20 13 10 1 26 20 To answer the question, find 2 –. 3 10 3434 3 10 3434 3 10 Since <, rename 2. Estimate 2 – 2 – 1 = 1. 3 10 3434 3 10 2 Rename 2 as 1 + 1 = 1 +, or 1. 3 10 3 10 13 10 13 10 1 13 10 Additional Examples