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
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.
YES NO2 4364 11
128 31316 25
YES NO10 2465 33225 79610 246
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.