Learn on PengienVision, Mathematics, Grade 4Chapter 9: Understand Addition and Subtraction of Fractions

Lesson 3: Add Fractions with Like Denominators

Property.

Section 1

Add Fractions with Like Denominators

Property

To add fractions with the same denominator, add the numerators and keep the denominator the same.

ac+bc=a+bc\frac{a}{c} + \frac{b}{c} = \frac{a+b}{c}

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Chapter 9: Understand Addition and Subtraction of Fractions

  1. Lesson 1

    Lesson 1: Model Addition of Fractions

  2. Lesson 2

    Lesson 2: Decompose Fractions

  3. Lesson 3Current

    Lesson 3: Add Fractions with Like Denominators

  4. Lesson 4

    Lesson 4: Model Subtraction of Fractions

  5. Lesson 5

    Lesson 5: Subtract Fractions with Like Denominators

  6. Lesson 6

    Lesson 6: Add and Subtract Fractions with Like Denominators

  7. Lesson 7

    Lesson 7: Model Addition and Subtraction of Mixed Numbers

  8. Lesson 8

    Lesson 8: Add Mixed Numbers

  9. Lesson 9

    Lesson 9: Subtract Mixed Numbers

Lesson overview

Expand to review the lesson summary and core properties.

Expand

Section 1

Add Fractions with Like Denominators

Property

To add fractions with the same denominator, add the numerators and keep the denominator the same.

ac+bc=a+bc\frac{a}{c} + \frac{b}{c} = \frac{a+b}{c}

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 9: Understand Addition and Subtraction of Fractions

  1. Lesson 1

    Lesson 1: Model Addition of Fractions

  2. Lesson 2

    Lesson 2: Decompose Fractions

  3. Lesson 3Current

    Lesson 3: Add Fractions with Like Denominators

  4. Lesson 4

    Lesson 4: Model Subtraction of Fractions

  5. Lesson 5

    Lesson 5: Subtract Fractions with Like Denominators

  6. Lesson 6

    Lesson 6: Add and Subtract Fractions with Like Denominators

  7. Lesson 7

    Lesson 7: Model Addition and Subtraction of Mixed Numbers

  8. Lesson 8

    Lesson 8: Add Mixed Numbers

  9. Lesson 9

    Lesson 9: Subtract Mixed Numbers