# Ch 5: ORELA Middle Grades Math: Number Theory

Need a quick refresher on composite numbers and prime factorization? Get it here, along with other number theory topics, to prepare for the ORELA Middle Grades Mathematics exam.

## ORELA Middle Grades Math: Number Theory - Chapter Summary

This chapter dives into prime and composite numbers, common factors and multiples and factorization. Our experienced instructors bring you memorable lessons with engaging graphics on topics including:

• Identifying composite and prime numbers
• Defining odd and even numbers
• Finding the prime factorization of numbers and exponents
• Identifying greatest common factors and least common multiples
• Finding least common multiples with prime factorization
• Working with common multiples and factors in word problems

Along with the short videos, you will get a lesson transcript with key terms bolded for easy reference and a brief quiz to test your retention of main points. Take the chapter quiz as well to get more practice in answering the kinds of questions you will see when taking the ORELA Middle Grades Mathematics test, returning to lessons where you find you may need additional review.

### ORELA Middle Grades Math: Number Theory Chapter

Of the 150 multiple-choice questions you will have to answer on test day, the parent content domain of estimation and rounding--Number Sense and Operations--accounts for 17%, though you may also use principles covered here to answer questions quickly in other domains. You will have four hours and 15 minutes to complete this test, and must do so using only the on-screen calculator and the notes material they provide at the testing center. You must achieve a scaled score of 225 or higher on the 100-300 scale to pass and receive this endorsement on your Oregon educator's license. You will receive your scaled score before leaving the testing center, but the two score reports you are sent will take about two weeks to get to you.

Get ready for test day with the review and test practice presented in this chapter. While we can't promise you a passing score, we can indeed promise that your time here will give you plenty of review on key topics and relevant practice, helping to boost your competence and confidence before sitting down to take the test.

9 Lessons in Chapter 5: ORELA Middle Grades Math: Number Theory
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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