Lesson 6.136.13 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can write a number as a product of its prime factors using a factor tree — one step at a time, with support.
Remember6.13 Small Group · Group 1
Keep splitting a number into factors until every branch is prime, then write the number as the product of those primes. Prime factorization writes a number as a product of prime numbers only. A factor tree helps you find them.
Words: Prime Factorization (Factorización prima)Prime number (Número primo)Composite number (Número compuesto)Factor (Factor)Factor tree (Árbol de factores)
-
1Complete each step, then write the final answer.
Make a factor tree for 28. Then fill in the blank: 28 = 2 × 2 × ___.
Show your workHint Start with 28 = 4 × 7. Then split 4.
Final answer: -
2Complete each step, then write the final answer.
Fill in the blank: 50 = 2 × 5 × ___.
Show your workHint Start with 50 = 5 × 10. Then split 10.
Final answer: -
3Complete each step, then write the final answer.
A store packs 2 × 3² × 7 apples in one box. How many apples are in the box?
Show your workHint 3² means 3 × 3. Write all the primes, then multiply.
Final answer: -
4Complete each step, then write the final answer.
Find the prime factorization of 120. What is the exponent on 2?
Show your workHint Start with 120 = 10 × 12. Split until every branch is prime. Count the 2s.
Final answer:
Explain your thinkingHow do you know when a factor tree is finished? Use Kai's mistake with 24 to explain.
Sentence starter A branch stops when the number is ___. · Kai was not done because ___.