Math Example: Language of Math--Variable Expressions--Multiplication and Subtraction--Example 26

Topic

Variable Expressions

Description

This example demonstrates the conversion of the verbal statement "Negative nine times a number less negative thirteen" into the variable expression -9x - (-13). It showcases how to interpret multiplication and subtraction operations within a sentence, especially when dealing with negative numbers, and translate them into algebraic symbols, using x to represent "a number".

Variable expressions form the foundation of algebraic thinking, enabling the translation of real-world scenarios into mathematical language. This collection of examples guides students through the process of identifying key phrases that indicate specific operations and converting them into symbolic form. By engaging with these examples, students develop critical skills in mathematical interpretation and communication.

Encountering a variety of examples is crucial for students to fully comprehend the concept of variable expressions. Each example presents a unique scenario, challenging students to apply their understanding in different contexts. This diverse practice builds flexibility in thinking and reinforces the connection between verbal and symbolic representations of mathematical ideas.

Teacher Script: Excellent work on this complex example! Notice how "negative nine times a number" becomes -9x. Then we subtract negative thirteen, which is the same as adding positive thirteen. Can you simplify this expression further? Try rewriting it without the double negative. Keep practicing with different combinations of operations and negative numbers to strengthen your translation and simplification skills!

For a complete collection of math examples related to Variable Expressions click on this link: Math Examples: Variable Expressions: Multiplication and Subtraction Collection.