Learn on PengiSaxon Math, Intermediate 4Chapter 3: Lessons 21–30, Investigation 3

Lesson 26: Drawing Pictures of Fractions

In Saxon Math Intermediate 4, Grade 4 students learn how to draw pictures of fractions by dividing shapes such as rectangles, squares, and circles into equal parts and shading a specified number of those parts. The lesson covers representing common fractions like one half, one third, two thirds, and three fourths visually, and asks students to verify whether a figure is correctly shaded for a given fraction.

Section 1

📘 Drawing Pictures of Fractions

New Concept

We can understand fractions better if we learn to draw pictures that represent fractions.

What’s next

Next, you’ll practice this skill by drawing and shading fractions of common shapes like rectangles and circles.

Section 2

Drawing Pictures of Fractions

Property

A fraction such as ab\frac{a}{b} can be represented by dividing a whole shape into bb equal parts and then shading or selecting aa of those parts.

Examples

To represent 23\frac{2}{3} of a rectangle: Divide the rectangle into 3 equal vertical strips and then shade 2 of them.
To show 34\frac{3}{4} of a circle: Divide the circle into 4 equal wedges, like a pizza, and then shade 3 of the wedges.
To draw 12\frac{1}{2} of a square: Draw a single line down the middle to make two equal halves and shade one side.

Explanation

Think of it like sharing a candy bar. To show 23\frac{2}{3}, you first break the bar into 3 perfectly equal pieces (that's the denominator!). Then, you get to point to 2 of those delicious pieces (the numerator). This turns abstract fraction numbers into an easy-to-see picture!

Section 3

The Rule of Equal Parts

Property

To correctly represent a fraction visually, the whole shape must be divided into parts of equal size. If the parts are not equal, the shaded area does not accurately represent the fraction.

Examples

A circle cut into two pieces, one big and one small, does NOT correctly show 12\frac{1}{2}.
A rectangle divided into 3 strips of different widths does NOT correctly show 13\frac{1}{3}.
To correctly show 14\frac{1}{4}, a square must be divided into four smaller squares of the exact same size.

Explanation

Imagine sharing a pizza. You can't give your friend a tiny sliver and keep the giant rest while calling it 'half'! For fractions to be fair and accurate, every single piece you divide the shape into must be exactly the same size. No cheating by making some parts bigger!

Section 4

What Fraction Is Shaded?

Property

To identify the fraction shown in a figure, count the total number of equal parts to find the denominator. Then, count the number of shaded parts to find the numerator. The fraction is Shaded PartsTotal Parts\frac{\text{Shaded Parts}}{\text{Total Parts}}.

Examples

A rectangle is divided into 5 equal bars and 3 are shaded. The fraction is 35\frac{3}{5}.
A circle is cut into 8 equal slices and 5 are shaded. The fraction is 58\frac{5}{8}.
A grid has 10 total squares and 7 are shaded. The fraction represented is 710\frac{7}{10}.

Explanation

Become a fraction detective! Your first mission is to count all the equal pieces in a shape—that gives you the bottom number (denominator). Your second mission is to count only the shaded pieces—that's your top number (numerator). Put them together, and you've solved the mystery of the fraction!

Book overview

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Chapter 3: Lessons 21–30, Investigation 3

  1. Lesson 1

    Lesson 21: Triangles, Rectangles, Squares, and Circles, Activity Drawing a Circle

  2. Lesson 2

    Lesson 22: Naming Fractions, Adding Dollars and Cents, Activity Counting Money

  3. Lesson 3

    Lesson 23: Lines, Segments, Rays, and Angles, Activity Real-World Segments and Angles

  4. Lesson 4

    Lesson 24: Inverse Operations

  5. Lesson 5

    Lesson 25: Subtraction Word Problems

  6. Lesson 6Current

    Lesson 26: Drawing Pictures of Fractions

  7. Lesson 7

    Lesson 27: Multiplication as Repeated Addition, More Elapsed Time Problems, Activity Finding Time

  8. Lesson 8

    Lesson 28: Multiplication Table

  9. Lesson 9

    Lesson 29: Multiplication Facts: 0s, 1s, 2s, 5s

  10. Lesson 10

    Lesson 30: Subtracting Three-Digit Numbers with Regrouping, Activity Subtracting Money

  11. Lesson 11

    Investigation 3: Multiplication Patterns, Area, Squares and Square Roots, Activity 1 Finding Perimeter and Area, Activity 2 Estimating Perimeter and Area

Lesson overview

Expand to review the lesson summary and core properties.

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Section 1

📘 Drawing Pictures of Fractions

New Concept

We can understand fractions better if we learn to draw pictures that represent fractions.

What’s next

Next, you’ll practice this skill by drawing and shading fractions of common shapes like rectangles and circles.

Section 2

Drawing Pictures of Fractions

Property

A fraction such as ab\frac{a}{b} can be represented by dividing a whole shape into bb equal parts and then shading or selecting aa of those parts.

Examples

To represent 23\frac{2}{3} of a rectangle: Divide the rectangle into 3 equal vertical strips and then shade 2 of them.
To show 34\frac{3}{4} of a circle: Divide the circle into 4 equal wedges, like a pizza, and then shade 3 of the wedges.
To draw 12\frac{1}{2} of a square: Draw a single line down the middle to make two equal halves and shade one side.

Explanation

Think of it like sharing a candy bar. To show 23\frac{2}{3}, you first break the bar into 3 perfectly equal pieces (that's the denominator!). Then, you get to point to 2 of those delicious pieces (the numerator). This turns abstract fraction numbers into an easy-to-see picture!

Section 3

The Rule of Equal Parts

Property

To correctly represent a fraction visually, the whole shape must be divided into parts of equal size. If the parts are not equal, the shaded area does not accurately represent the fraction.

Examples

A circle cut into two pieces, one big and one small, does NOT correctly show 12\frac{1}{2}.
A rectangle divided into 3 strips of different widths does NOT correctly show 13\frac{1}{3}.
To correctly show 14\frac{1}{4}, a square must be divided into four smaller squares of the exact same size.

Explanation

Imagine sharing a pizza. You can't give your friend a tiny sliver and keep the giant rest while calling it 'half'! For fractions to be fair and accurate, every single piece you divide the shape into must be exactly the same size. No cheating by making some parts bigger!

Section 4

What Fraction Is Shaded?

Property

To identify the fraction shown in a figure, count the total number of equal parts to find the denominator. Then, count the number of shaded parts to find the numerator. The fraction is Shaded PartsTotal Parts\frac{\text{Shaded Parts}}{\text{Total Parts}}.

Examples

A rectangle is divided into 5 equal bars and 3 are shaded. The fraction is 35\frac{3}{5}.
A circle is cut into 8 equal slices and 5 are shaded. The fraction is 58\frac{5}{8}.
A grid has 10 total squares and 7 are shaded. The fraction represented is 710\frac{7}{10}.

Explanation

Become a fraction detective! Your first mission is to count all the equal pieces in a shape—that gives you the bottom number (denominator). Your second mission is to count only the shaded pieces—that's your top number (numerator). Put them together, and you've solved the mystery of the fraction!

Book overview

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

Continue this chapter

Chapter 3: Lessons 21–30, Investigation 3

  1. Lesson 1

    Lesson 21: Triangles, Rectangles, Squares, and Circles, Activity Drawing a Circle

  2. Lesson 2

    Lesson 22: Naming Fractions, Adding Dollars and Cents, Activity Counting Money

  3. Lesson 3

    Lesson 23: Lines, Segments, Rays, and Angles, Activity Real-World Segments and Angles

  4. Lesson 4

    Lesson 24: Inverse Operations

  5. Lesson 5

    Lesson 25: Subtraction Word Problems

  6. Lesson 6Current

    Lesson 26: Drawing Pictures of Fractions

  7. Lesson 7

    Lesson 27: Multiplication as Repeated Addition, More Elapsed Time Problems, Activity Finding Time

  8. Lesson 8

    Lesson 28: Multiplication Table

  9. Lesson 9

    Lesson 29: Multiplication Facts: 0s, 1s, 2s, 5s

  10. Lesson 10

    Lesson 30: Subtracting Three-Digit Numbers with Regrouping, Activity Subtracting Money

  11. Lesson 11

    Investigation 3: Multiplication Patterns, Area, Squares and Square Roots, Activity 1 Finding Perimeter and Area, Activity 2 Estimating Perimeter and Area