Math Example: Language of Math--Numerical Expressions--Multiplication--Example 28

Topic

Numerical Expressions

Description

This example demonstrates the conversion of the phrase "Negative eleven by fifteen" into a numerical expression. The solution explains that the word "by" is often used to express dimensions and can indicate multiplication, especially when calculating area. The resulting expression is -11 * 15, showing how everyday language can be translated into precise mathematical notation.

Numerical expressions are essential in mathematics, providing a standardized way to represent calculations and relationships between numbers. This collection of examples helps students recognize various verbal cues that indicate multiplication, enhancing their ability to interpret and formulate mathematical statements.

Exposure to multiple worked examples is crucial for students to fully grasp the concept of numerical expressions. Each example reinforces the underlying principles while introducing slight variations, helping students build a flexible understanding that can be applied to new situations. This approach fosters critical thinking and problem-solving skills.

Teacher Script: "Let's look at this interesting example. We have the phrase 'Negative eleven by fifteen.' The word 'by' might seem unusual in a math context, but it's actually a common way to express multiplication, especially when talking about dimensions. How do you think we should write this as a numerical expression? Consider the placement of the negative sign and what symbol we use for multiplication. Take a moment to think about it, and then we'll discuss your ideas and the correct approach."

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