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Factor Pairs to 100

4.OA.4
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Aligned To Common Core Standard:

Grade 4 Operations - 4.OA.4

What Are Factor Pairs? To understand factor pairs, we have to go back to revising natural numbers. You see, every natural number is a product of at least a one-factor pair. For example, 19 has a single factor pair, which is 1 and 19, because 19 is present in the tables of 1 and 19 itself. The number 32 has many factor pairs, such as 1 and 32, 2 and 16, and 4 and 8. So, by definition, a factor pair are those two natural numbers that are multiplied to get a specific answer. Notice that 19 has a single factor pair. It is because 19 is a prime number, so it can be said that every prime number has a single factor pair. Let’s take another example by finding out the factor pair of 23. Can you think of any number of tables which answer 23? No? That’s right, 23 does not have another factor pair, because it is a prime number. A few other examples of factor pairs are given below. - 18 -> (1, 18), (2, 9), (3, 6). - 24 -> (1, 24), (4, 6), (8, 3) - 50 -> (1, 50), (2, 25), (5, 10)

Printable Worksheets And Lessons






Homework Sheets

We mix up the skills here. You will first look for multiples of a particular number, then write all of the factors of a number. We finish off the homework with a little divisibility practice.




Practice Worksheets

This really works on your understanding of multiples, divisibility, and factors. We really clear it up for you.




Math Skill Quizzes

The quizzes are also more mixed then other sections. You start by listing factors. We move on to determining if a number is prime or composite. We finish off with Odds or Evens.

  • Factors Quiz - Find all the factors of each number.
  • Primes Quiz - Name the numbers as Prime or Composite and list their factors.
  • Odds or Evens Quiz - Find all the factors of and label each number as odd or even.