Math Example: Language of Math--Numerical Expressions--Multiplication--Example 12

Topic

Numerical Expressions

Description

This example demonstrates how to convert the phrase "Thirteen multiplied by negative seven" into a numerical expression. The term "multiplied by" clearly indicates multiplication, and the presence of a negative number introduces the concept of multiplying a positive number by a negative one. The resulting expression is 13 * (-7).

Numerical expressions are a crucial concept in mathematics, serving as a bridge between verbal descriptions and mathematical operations. This collection of examples helps teach the topic by presenting various ways multiplication can be expressed in everyday language, including cases with negative numbers. Students learn to recognize key phrases and translate them into mathematical symbols, while also understanding the rules for multiplying positive and negative numbers.

Exposure to multiple worked-out examples is essential for students to fully grasp the concept of numerical expressions, particularly when dealing with positive and negative numbers. Each example reinforces the core principles while introducing subtle variations, helping students develop a comprehensive understanding of how language can represent mathematical operations. This approach enhances pattern recognition skills and builds overall mathematical proficiency.

Teacher Script: "In this example, we see the phrase 'multiplied by' which is a clear indicator of multiplication. Pay attention to the negative number - it keeps its sign in the expression. Can you think of other ways to phrase this multiplication problem using different words or phrases?"

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