Math

Study of numbers, quantities, shapes, and patterns.

Numbers and CountingShapes and GeometryPatterns and Sequences
Fractions and DecimalsMeasurement and UnitsIntroduction to Algebra
Math in ShoppingMath in SportsMath at Home
Breaking Down ProblemsChecking Your Work
Numbers and CountingShapes and GeometryPatterns and Sequenc...Fractions and Decima...Measurement and Unit...Introduction to Alge...Math in ShoppingMath in SportsMath at HomeBreaking Down Proble...Checking Your Work
Advanced Topics

Fractions and Decimals

Understanding Parts of a Whole

Fractions and decimals help us talk about parts of things. A fraction like \( \frac{1}{2} \) means one out of two equal parts.

  • Fractions:

    • Numerator (top number) shows how many parts you have.
    • Denominator (bottom number) shows the total number of equal parts.

  • Decimals:

    • Decimals are another way to write fractions, using a dot. For example, 0.5 is the same as \( \frac{1}{2} \).

Using Fractions and Decimals

Fractions and decimals are useful when sharing pizza, measuring ingredients, or reading money amounts.

Converting Between Fractions and Decimals

You can change a fraction to a decimal by dividing the top number by the bottom number.

Key Formula

\[0.5 = \frac{1}{2}\]

Examples

  • Measuring half a cup of water for a recipe.

  • Comparing 0.25 and 1/4 to see they are equal.

In a Nutshell

Fractions and decimals let us describe parts of things, like slices of pizza or amounts of money.

Key Terms

Numerator
The top number in a fraction, showing how many parts you have.
Denominator
The bottom number in a fraction, showing the total number of parts.
Next
Measurement and Units