Math Example: Language of Math--Numerical Expressions--Multiplication--Example 40

Topic

Numerical Expressions

Description

This example demonstrates how to convert the phrase "Negative nine multiples of negative fifteen" into a numerical expression. The image uses color-coded text and arrows to guide students through the process of translating this verbal statement into mathematical symbols, resulting in the expression -15 * (-9). This example emphasizes the importance of understanding the order of factors in multiplication, especially when dealing with negative numbers.

Numerical expressions are a crucial component of mathematical language, serving as a bridge between verbal descriptions and symbolic representations. This collection of examples helps students develop proficiency in interpreting various phrases that indicate multiplication, such as "multiples of," and accurately converting them into mathematical notation. By presenting these conversions visually, students can better grasp the connection between language and mathematical operations.

Exposure to multiple worked-out examples is essential for students to fully comprehend the concept of numerical expressions. Each example reinforces the pattern recognition skills needed to identify multiplication in verbal statements and translate them accurately into mathematical form. This repetition helps solidify the concept and improves students' ability to apply it in various contexts, ultimately leading to a deeper understanding of mathematical language and operations.

Teacher Script: "Let's explore this example together. When we see the phrase 'Negative nine multiples of negative fifteen,' we need to recognize that 'multiples of' indicates multiplication. We write -15 first, then multiply it by -9. Can you explain why we write it as -15 * (-9) and not -9 * (-15)? Both give the same result, but which one matches the original phrase more closely? Remember, the order of factors matters when we're translating verbal expressions into mathematical notation."

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