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Factors • Learning Goal: Demonstrate an understanding of factors of numbers less than 100 Kid friendly: Show that you can find the factors of a number less than 100 What I think I know: What is a factor? • Factors are numbers you can multiply together to get another number: • Example: 2 and 3 are factors of 6, because 2 × 3 = 6. • A number can have MANY factors! Factors of 12 • Example: What are the factors of 12? • 2 x 6, 4 x 3, 1 x 12 • 1, 2, 3, 4, 6, 12 Points to Consider What number is a factor of EVERY number? 1 is a factor of EVERY number Strategies to find factors • Rainbow method • Factor Tree • Table • Graph paper The Factor Game • On your game card the numbers 1 – 30 are listed. The goal of the game is to choose the numbers that have the most amount of factors • Rock, paper, scissors to determine which partner goes first • On your turn, you may pick any number on the card. You and your partner then need to find all of the factors of that number. – However many factors = your score for that round. Keep a record of this on the side. • You many only take 10 seconds each turn to choose your number. • The game is over when either the class time runs out, or you have used all of the numbers on your card. You should each have a final score. To consider • Do you think that it makes sense to split a day into 24 hours? – Would another number have been a better choice? • Why or why not? Practice Find the Greatest Common Factors (GCF) between the numbers below. Use whichever strategy you like. I would encourage you to try using more than one! 1. 2. 3. 4. 28 and 52 120 and 80 36 and 49 32 and 20