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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Number Theory GONE WILD!
Factors “Fall” into Families
Multiples Multiply like Rabbits!
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.
128 313 16 25
YES NO 10 24 65 33 225 79 610 246Turn to a partner and try to figure out what the “yes” numbers have in common
Then, try to identify “What’s the rule?”
Tell whether 462 is divisible by 2, 3, 4, and 5.
The last digit, 2, is even.
The sum of the digits is 4 + 6 + 2 = 12. 12 is divisible by 3.
The last two digits form the number 62. 62 is not divisible by 4.
The last digit is 2.
So 462 is divisible by 2 and 3.
Tell whether 540 is divisible by 6, 9, and 10.
The number is divisible by both 2 and 3.
The sum of the digits is 5 + 4 + 0 = 9. 9 is divisible by 9.
The last digit is 0.
So 540 is divisible by 6, 9, and 10.
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.