In this Grade 4 enVision Mathematics lesson from Chapter 7 on Factors and Multiples, students learn to identify whole numbers as prime or composite by examining their factors. A prime number has exactly two factors (1 and itself), while a composite number has more than two factors, and students practice applying these definitions to numbers up to 97. The lesson also addresses the special case that 1 is neither prime nor composite.
Section 1
Defining Prime and Composite Numbers
A prime number is a whole number greater than 1 that has exactly two factors: 1 and itself.
A composite number is a whole number that has more than two factors.
The number 1 is a special case and is neither prime nor composite because it has only one factor.
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Section 1
Defining Prime and Composite Numbers
A prime number is a whole number greater than 1 that has exactly two factors: 1 and itself.
A composite number is a whole number that has more than two factors.
The number 1 is a special case and is neither prime nor composite because it has only one factor.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter