Mixed Exercises: Objectives 2 and 3 Perform the indicated operations. 65) 7 9 8 9 3 9 66) 4 5 13 5 1 5 67) 7 4 3 4 68) 19 10 9 10 69) 19 16 7 16 2 16 70) 17 20 12 20 3 20 71) 2 11 5 11 72) 4 17 8 17 73) 27 12 17 12 22 12 74) 23 30 11 30 39 30 R1) Write a general statement that will help you add or subtract like fractions. R2) Write an application problem involving three leftover pizzas, each of which was cut into 10 slices. R3) Was this a diffi cult topic to understand? Think about how long it took you to complete the exercises. 4.2 Least Common Multiples What are your objectives for Section 4.2? How can you accomplish each objective? 1 Find the Least Common Multiple (LCM) • Describe the process of fi nding multiples. • Write the defi nition of the least common multiple (LCM). • Make a chart that describes the different ways to fi nd the LCM. • Complete the given examples on your own. • Complete You Trys 1–3. 2 Find the LCM Using Prime Factorization • Write the procedure for Finding the LCM Using Prime Factorization in your own words. • Complete the given example on your own by comparing it to the procedure presented. • Complete You Try 4. Read the explanations, follow the examples, take notes, and complete the You Trys. In Section 4.1, we learned that we could add and subtract fractions only if they have the same denominator. That is, they must be like fractions. If we are asked to add or subtract unlike fractions, such as 2 5 1 3 or 8 9 5 6 , then we must fi rst write the fractions with the same denominator. Before we can do this, we must learn about the least common multiple, or LCM, of a group of numbers. www.mhhe.com/messersmith SECTION 4.2 Least Common Multiples 229
messersmith_power_basic_college_1e_ch4_7_10
To see the actual publication please follow the link above