Problem 215 - Prealgebra

Question

In the following exercises, solve. Class size Olivia’s third grade class has 35 children. Last year, her second grade class had 22 children. What is the difference between the number of children in Olivia’s third grade class and her second grade class?

Step-by-Step Solution

Answer

The difference is 13 children.

Step 1: Identify the numbers given

The problem states that Olivia's third grade class has 35 children and her second grade class had 22 children.

Step 2: Set up the subtraction

To find the difference between the two classes, subtract the number of children in the second grade class from the number in the third grade class: 35 - 22

Step 3: Perform the subtraction

Calculate the difference by subtracting 22 from 35: 35 - 22 = 13

Key Concepts

subtraction

Subtraction is one of the basic operations in arithmetic. It's all about finding out how much one number is smaller than another. When you subtract, you're taking away. In our exercise, we're finding out how many more children are in Olivia’s third grade class compared to her second grade class.

Basic Subtraction Process:

• Start with the larger number (35 children in third grade).
• Take away the smaller number (22 children in second grade).
• The difference gives you the answer (how many more children are in third grade).

This process of subtraction helps us compare two different quantities. Knowing how to subtract is crucial in elementary math education because it builds a foundation for many more complex problems and operations.

problem-solving steps

Solving word problems involves several important steps. Understanding these steps can help make solving problems easier and more efficient.

Key Problem-Solving Steps:

• Step 1: Identify the numbers given. In our problem, we know the third grade class has 35 children and the second grade class has 22 children.
• Step 2: Set up the subtraction. Here, we arrange the numbers so that we can subtract the second grade number from the third-grade number: 35 - 22.
• Step 3: Perform the subtraction. We finally subtract 22 from 35. Using simple arithmetic, we find that 35 - 22 = 13.

Following these steps ensures that we approach the problem logically and don't skip any important parts. It’s a good idea to write down each step to avoid mistakes.

elementary math education

Elementary math education is essential for building a strong foundation in mathematics. During these early years, students learn basic operations like addition, subtraction, multiplication, and division. These are the building blocks for all future math learning.

Why Elementary Math is Important:

• Foundation Skills: Understanding basic math operations like subtraction helps students solve more complex problems later.
• Problem-Solving: Practicing word problems enhances logical thinking and real-world application of math.
• Confidence: Mastery of basic skills boosts a child's confidence and interest in math.

Teachers and parents play a crucial role in supporting children's math education. Engaging activities, positive reinforcement, and real-life examples make learning math fun and effective. The exercise we worked on not only teaches subtraction but also how to think critically about a problem.