Class Flow: Divisibility & Factorials

For this divisibility worksheet, students tell whether numbers are divisible by given numbers, use a table to solve 2 word problems and solve 1 addition word problem. Houghton Mifflin text is referenced.

Use the 20 Questions game to practice math vocabulary and number properties! Project a hundreds chart and hand one out to learners. Ideally, give them counters (beans would work well) to mark off the chart so you can play multiple times....

It's not a short cut, just good old fashion number sense, but kids will love it. This presentation does a wonderful job describing the divisibility rules by showing how each one works, reviewing the rules as a collective and providing an...

If your class has watched the Khan Academy video on recognizing divisibility, they will have a good foundation for this video on finding factors. Sal demonstrates how to find factors of a number by using the divisibility rules and...

Young learners apply divisibility rules to determine if a number is a factor of another number. They discuss what numbers are factors of another number and identify patterns using divisibility rules.

Students examine the rules of divisibility for the numbers 2, 3, 5, 6, 9 and 10. They apply these rules to larger numbers.

Students discover the Sieve of Erathosthenes. They explore a method to find all the prime numbers in a group of numbers. Using models, students practice divisibility rules while examining the difference between prime and composite numbers.

[Free Registration/Login Required] This flipchart introduces divisibility, primes and composites, averages, and estimating quotients.

[Free Registration/Login Required] Discover and apply divisibility rules for 2, 3 and 6.

Prime or composite, that is the question. Teach your class how to find the answer with this step-by-step presentation that defines and provides examples of each type of number. When addressing larger numbers, divisibility rules are...