A factor tree, and where it ends

One student splits 60 as 6 × 10. Another splits it as 4 × 15.

Split any way. The ends do not change.

A factor tree splits a number until every branch is prime. Try 6 × 10 and 4 × 15. Both trees end on 2, 2, 3 and 5. The ends are the primes at the bottom of each tree. The primes may appear in a different order on the page.

Do not split with 1. A split like 1 × 60 does not make the number smaller.

Try the lab to finish this lesson.