Lesson 2 Name Parts as Fractions

    • Let’s use fractions to describe parts.

Warm-up Which One Doesn’t Belong: Shaded Parts

Which one doesn’t belong?

  1. Diagram. Rectangle partitioned into 2 parts.
  2. Diagram. Rectangle partitioned into 3 equal parts, 1 of them shaded.
  3. Diagram. Rectangle partitioned into 2 parts.
  4. Diagram. Rectangle partitioned into 2 parts.

Activity 1 Partition the Strips

Your teacher will give you some paper strips. Each strip represents 1.

Fold each strip so that the parts represent one of the following fractions. Use one strip for each fraction.

  • halves

  • fourths

  • eighths

  • thirds

  • sixths

When you finish folding, trace your folding lines with a pencil and then label each part with the correct fraction.

Activity 2 Partition, Shade, Trade

Problem 1

Partition each rectangle into halves, thirds, fourths, sixths, and eighths. Then label each part with the correct fraction.

halves

Diagram. Rectangle.

thirds

Diagram. Rectangle.

fourths

Diagram. Rectangle.

sixths

Diagram. Rectangle.

eighths

Diagram. Rectangle.

Problem 2

  1. Partition the rectangle into equal-sized parts. Shade one of the parts.

    Diagram. Rectangle.

  2. Trade rectangles with a partner. If the whole rectangle is 1, what number represents the shaded part? Explain your reasoning.

Practice Problem

Problem 1

  1. What fraction of the rectangle is shaded?

    Diagram. Rectangle partitioned into 6 equal parts, one of them shaded.

  2. Partition the rectangle into 8 equal parts.

    What fraction of the whole rectangle does each part represent?

    Diagram. Rectangle.