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- Paul H., Teacher
- Lakewood, NJ
Greatest Common Factor Teacher Resources
Find Greatest Common Factor educational ideas and activities
Sal explains that the greatest common factor of any number is the largest number divisible into both monomials and not necessarily the number with greatest value. He breaks down two numbers into their prime factors as a product of its primes then identifies the GCF of greatest common factor.
These multiples share a few factors, but which one is the greatest? Scholars list the factors for various number pairs, first just indicating common factors. Next, they do the same but write down the greatest common factor. Finally, there are two sets asking mathematicians to find the GCF between three numbers. There is an example to demonstrate the three-number problem. Instructions encourage kids to physically circle the common factors.
Learners complete activities to practice identifying greatest common factors and least common multiples. They will use real-world problems to practice with. The lesson plan provides problems and a well-written outline to use when teaching these skills as well as a variety of worksheets that you can assign.
Watch Sal simplify the fraction 48/64 to its lowest terms. He draws a candy bar to represent the whole and explains what the fraction 48/64 means. He groups each number by its greatest common divisor as a way to determine how he will divide. His process is thoroughly explained and would be appropriate for 5th or 6th grade students.
A terrific presentation on finding the greatest common factor between two numbers is found through this link. IMath learners are coached on the best way to find this important number. Terrific graphics and text are present throughout and the techniques shown on how to solve the problems are clearly described. A very good PowerPoint!
Seventh graders examine Prime Factorizations, Multiples, and Factors. In this prime number, factorization, and multiples instructional activity, 7th graders identify greatest common factors and least common multiples. Students use problem solving skills to explore prime numbers, multiples and factorization.
A bit of instruction on how to find the greatest common factor opens the worksheet. Leanrers are then given three practice pairs of numbers. Then the assignment goes on to describe prime factorization, and also provides three more practice pairs. This is an apt assignment for practicing factoring skills.