Below are six versions of our grade 4 math worksheet on deriving the prime factors of a number using a factor tree. Answers are given on the second page. Note that in some cases there is more than one possible correct combination
of intermediate factors, but the factors at the bottom of each branch [the prime factors] should be the same as in the answers given. Explore all of our factoring worksheets, from factoring numbers under 50 to prime factor trees, GCFs and LCMs.Factoring worksheets: prime factor trees
More factoring & prime factors worksheets
Factoring worksheets from K5 Learning
These worksheets ask students to find all the factors of different sized numbers. Prime factors trees are also introduced.
Factoring | |
| Find the factors of a number between 4 and 50 | 6: 1,2,3,6 |
| Find the factors of a number between 4 and 100 | 26: 1,2,4,13,26 |
| Prime factor trees | |
| Prime factors | 18: 2 x 3 x 3 |
| Divisibility rules | Rules for 2,3,5,9,10 |
Multiples | |
| Multiples of whole numbers | 8: 8, 16, 24 ... |
More factoring & prime factors worksheets
Explore all of our factoring worksheets, from factoring numbers under 50 to prime factor trees, GCFs and LCMs.
Our printable prime factorization worksheets are the place to be if great scores in finding prime factors continue to elude you. Each pdf resource here includes several composite numbers, where the students must practice determining their prime factors. Instruct them to identify the smallest prime factor of each number to work their way up using the divisibility rules and to refer to the included answer key whenever there's a need to.
These free worksheets are most recommended for students in grade 4, grade 5, and grade 6.
CCSS: 4.OA
Prime Factorization of 2-Digit Numbers Worksheets
The better the child knows how to factor a number, the easier it is for them to demystify the concept of prime factorization! Encourage children to do the factorization by starting at the smallest prime number and working upward.
Prime Factorization of 3-Digit Numbers Worksheets
To solve these 3-digit prime factorization pdfs, express each numeral in the prime factor form. The plucky and determined young learners will soon display the smarts to look at 220, for instance, and write it as 2 x 2 x 5 x 11.
Prime Factorization - Easy | Worksheet #1
Nothing can match the joy of children performing prime factorization with utmost success, as in these pdf practice tools! Watch them use the divisibility rules with absolute mastery and find the prime factors to perfection.
Prime Factorization - Easy | Worksheet #2
Each of these printable worksheets contains ten easy exercises, and that is, hands down, a lot of prepping! Direct the children to break down the composite numbers up to 50 into the smallest possible prime factors.
Prime Factorization - Moderate | Worksheet #1
Open up a promising world of practice in prime factorization for the 5th grade and 6th grade students with this section of our free prime factorization worksheets, where they are up against moderately difficult problems.
Prime Factorization - Moderate | Worksheet #2
Such is the intrigue that surrounds the topic that young learners can't take their eyes off numbers in their prime factor form! They will soon go all guns blazing, finding prime factorization of 2-digit and 3-digit numbers.