Lesson Info: Factor Trees (Factoring Numbers) Gizmo

Factor Trees (Factoring Numbers)

The Factor Trees Gizmo has two modes. In Factor mode, you can create factor trees to factor composite numbers into primes. In Build mode, you can build numbers by multiplying primes together. Can you build all composite numbers up to 50? Any whole composite number up to 999 can be factored or built with the Gizmo.

User Recommendations (7)

Screenshot of Factor Trees (Factoring Numbers) Gizmo

LESSON MATERIALS:

Vocabulary Sheet
- Word
- PDF
Student Exploration Sheet
- Word
- PDF
Exploration Sheet Answer Key

Answer Key for Subscribers Only
Teacher Guide
- Word
- PDF

Assessment Questions

LEARNING OBJECTIVES:

Understand that some numbers, called prime numbers, have only two factors - one and themselves.
Understand that other numbers, called composite numbers, have multiple prime factors.
Factor composite numbers into prime numbers.
Build composite numbers by multiplying primes.
Use factors to understand multiples and divisibility.

VOCABULARY:

composite number, divisible, factor, factor tree, multiple, prime factorization, prime number, product

User Recommendations (7):

My favorite tool for prime factorization.

MATH: 6th Grade | Math 6

By: Sabrina Giroux (Florida) | Recommended 99 days ago
I used this as part of my bell work they loved it.

MATH: 7th Grade | Math 7, Pre-Algebra

By: Tonaya Allbaugh (Arkansas) | Recommended 101 days ago
Factors 5th grade

MATH: 5th Grade

By: Gwen Johnson (Texas) | Recommended 157 days ago
Fun and a great way to review prime factorization.

MATH: Math 7, Math 8

By: Mr. Branco (Ontario) | Recommended 291 days ago
This lets them work backward as well.

MATH: 3rd Grade, 4th Grade, 5th Grade

By: Carol Adams (Texas) | Recommended 294 days ago