203x Filetype PPT File size 0.63 MB Source: www.acpsd.net
Least Common Multiple Least Common Multiple (LCM) (LCM) Essential Question: Essential Question: How do I find the least common How do I find the least common multiple of two or three numbers, multiple of two or three numbers, and why is this relevant to me? and why is this relevant to me? Common Core Objective: Common Core Objective: 5.NS.4 5.NS.4 Common Core Objective: Common Core Objective: Students will be able to identify the least Students will be able to identify the least common multiple of two or three one, two, common multiple of two or three one, two, and three digit numbers with 80% accuracy. and three digit numbers with 80% accuracy. Least Common Multiple Least Common Multiple (LCM) (LCM) Vocabulary: Multiple – a non-zero . Least Common Multiple – the least non- zero common multiple of two or more numbers. Least Common Multiple Least Common Multiple (LCM) (LCM) When thinking about finding the When thinking about finding the Least Common Multiple, or the Least Common Multiple, or the LCM… LCM… REMEMBER REMEMBER L…The smallest number …The smallest number L C…all terms in common …all terms in common C M…from their list of multiples …from their list of multiples M Least Common Multiple Least Common Multiple (LCM) (LCM) Important to Remember… Important to Remember… There are TWO methods for There are methods for TWO finding the Common Multiples of finding the Common Multiples of two or more numbers… two or more numbers… Method 1…Use Multiple Lists Method 1…Use Multiple Lists Method 2…Use Prime Factorization Method 2…Use Prime Factorization Least Common Multiple Least Common Multiple (LCM) (LCM) Finding the LCM: Method 1 – Multiple List Finding the LCM: Method 1 – Multiple List Example 1: Find the LCM of 4 and 9. Example 1: Find the LCM of 4 and 9. Step 1: Create a list of multiples for each number Step 2: Circle the first multiple the numbers have in common 4: 4, 8, 12, 16, 20, 24, 28, 32, 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, … 36, 40, … 9: 9, 18, 27, 36, 45, 54, 63,… 9: 9, 18, 27, 36, 45, 54, 63,… The LCM of 4 and 9 is 36
no reviews yet
Please Login to review.