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Fun and Games

Fun and Games. Number Theory GONE WILD!. Factors “Fall” into Families. Multiples Multiply like Rabbits!. What am I Learning Today?. Divisibility Rules. How will I show that I learned it?. Create a graphic organizer that contains the divisibility rule, an example and an explanation.

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Fun and Games

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  1. Fun and Games Number Theory GONE WILD! Factors “Fall” into Families Multiples Multiply like Rabbits!

  2. What am I Learning Today? Divisibility Rules How will I show that I learned it? Create a graphic organizer that contains the divisibility rule, an example and an explanation. Use divisibility rules to determine the characteristics of numbers.

  3. YES NO 2 43 64 11 128 313 16 25 YES NO 10 24 65 33 225 79 610 246 Turn to a partner and try to figure out what the “yes” numbers have in common Then, try to identify “What’s the rule?”

  4. Checking Divisibility Tell whether 462 is divisible by 2, 3, 4, and 5. The last digit, 2, is even. Divisible The sum of the digits is 4 + 6 + 2 = 12. 12 is divisible by 3. Divisible Not divisible The last two digits form the number 62. 62 is not divisible by 4. Not divisible The last digit is 2. So 462 is divisible by 2 and 3.

  5. Checking Divisibility Tell whether 540 is divisible by 6, 9, and 10. The number is divisible by both 2 and 3. Divisible The sum of the digits is 5 + 4 + 0 = 9. 9 is divisible by 9. Divisible The last digit is 0. Divisible So 540 is divisible by 6, 9, and 10.

  6. Paired Discussion Turn to a partner and discuss the following: How can the divisibility rules help you identify composite numbers? If a number is divisible by 4 and 9, by what other numbers is it divisible? Explain.

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