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More Lessons for High School Regents Exam

Math Worksheets

High School Math based on the topics required for the Regents Exam conducted by NYSED.

**What is the Closure Property?**

- The closure property of addition for real numbers states that if a and b are real numbers, then a + b is a unique real number.
- The closure property of multiplication for real numbers states that if a and b are real numbers, then a × b is a unique real number.

Algebra - The Closure Property

An introduction for the concept of closure and closed sets

Is the set of natural numbers closed under addition?

Is the set of natural numbers closed under subtraction?

Is the set of natural numbers closed under multiplication?

Is the set of natural numbers closed under division?

Closure Properties, more examples

Is the set of all even natural numbers closed under addition?

Is the set of all squared natural closed under multiplication?

Is the set of all odd whole numbers closed under multiplication?

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