Unit 17: Fraction Operations

Day 8 of 30

Add fractions with like denominators

3-5Mathematics

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Learning Objective

Students will be able to add fractions with like denominators.

Today's Lesson

In this lesson, we'll explore how to add fractions with like denominators. Mathematical thinking develops logical reasoning and problem-solving abilities.

A fraction represents part of a whole. The top number (numerator) tells us how many parts we have. The bottom number (denominator) tells us how many equal parts make the whole. For example, 1/2 means we have 1 part out of 2 equal parts—that's one half. If you cut a pizza into 4 equal slices and take 1 slice, you have 1/4 of the pizza.

As you work through today's material, pay attention to the examples and try to identify the patterns or strategies being used. This will help you apply these concepts to new problems.

Take notes on key points and make connections to what you've already learned in previous lessons.

Key Terms
Problem

A mathematical question requiring analysis and solution

Solution

The result obtained by solving a problem

Activities
Instructions
1. Review the example problems for add fractions with like denominators. 2. Identify the steps and strategies used. 3. Work through practice problems independently. 4. Compare solutions with a partner.
Materials Needed
  • Notebook
  • Calculator (if needed)
  • Graph paper
Practice Problems
1

What fraction is shaded? [Picture: circle with 1 of 4 parts shaded]

Hint: Count the total parts and the shaded parts.
2

Which is larger: 1/2 or 1/4?

Hint: Think about cutting a pizza. Which piece is bigger?
3

Color 2/3 of the rectangle: [Rectangle divided into 3 parts]

Hint: The bottom number tells how many total parts. The top tells how many to color.

Teaching Tip

For this age group: Balance direct instruction with collaborative activities. Allow students to explain their thinking and make connections to prior knowledge when exploring add fractions with like denominators.

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