4.NF.1: Equivalent Fractions
I can explain why a fraction is still the same size if I multiply both the numerator and denominator by the same number. I can use this understanding to make equivalent fractions.
What Your Child Needs to Know
This standard focuses on helping your child understand equivalent fractions - different fractions that represent the same amount. In 4th grade, students learn that when you multiply both the top number (numerator) and bottom number (denominator) of a fraction by the same number, you get an equivalent fraction that represents the same value.
For example, 1/2 is equivalent to 2/4 because if you multiply both the numerator and denominator of 1/2 by 2, you get 2/4:
- 1 × 2 = 2 (new numerator)
- 2 × 2 = 4 (new denominator)
Understanding equivalent fractions is essential for comparing fractions, adding and subtracting fractions with unlike denominators, and developing a deeper understanding of rational numbers. This concept builds on previous fraction knowledge and prepares your child for more advanced fraction operations in later grades.
Real World Practice
Visual models and hands-on activitiesVisual Models for Equivalent Fractions
1. Fraction Strips
Create or print fraction strips that show different equivalent fractions. For example, show how 1/2 is the same amount as 2/4, 3/6, 4/8, etc. by coloring in the appropriate portions of each strip.
2. Area Models
Draw rectangles or circles divided into different numbers of equal parts. For example, draw a circle divided into 2 parts with 1 part shaded, and another circle divided into 4 parts with 2 parts shaded to show that 1/2 = 2/4.
3. Number Lines
Place equivalent fractions on the same point on a number line to visually show they have the same value. For example, mark 1/2, 2/4, and 3/6 at the same point on the number line.
Everyday Applications
1. Cooking and Recipes
Use measuring cups to show equivalent fractions. For example, show that 1/2 cup is the same as 2/4 cup by filling the 1/2 cup and pouring it into the 1/4 cup twice.
When doubling a recipe, discuss how the fractions change. For example, if a recipe calls for 1/3 cup of sugar, doubling it would require 2/3 cup.
2. Sharing Food
Cut food items (like pizza, sandwiches, or brownies) into different numbers of equal pieces to demonstrate equivalent fractions. For example, show that 1/2 of a pizza is the same amount as 2/4 or 3/6 of the same pizza.
3. Money
Use coins to represent fractions of a dollar. For example, 50 cents is 50/100 of a dollar, which is equivalent to 1/2 of a dollar. Similarly, 25 cents is 25/100 of a dollar, which is equivalent to 1/4 of a dollar.
Quick Checks
Strategies and quick activitiesWhen Your Child Struggles
1. Use Visual Models
If your child is having trouble understanding equivalent fractions conceptually, use visual models like fraction strips, area models, or number lines to show that equivalent fractions represent the same amount.
2. Focus on Multiplication
Help your child see the pattern of multiplying both the numerator and denominator by the same number. Start with simple fractions like 1/2 and show how multiplying both numbers by 2 gives 2/4, multiplying by 3 gives 3/6, etc.
3. Use Concrete Objects
Use physical objects like fraction tiles, Lego bricks, or paper folding to demonstrate equivalent fractions. For example, fold a paper in half and then in half again to show that 1/2 = 2/4.
4. Connect to Division
Show that you can also create equivalent fractions by dividing both the numerator and denominator by the same number (simplifying). For example, 6/8 ÷ 2/2 = 3/4.
5-Minute Activities
Activity 1: Equivalent Fraction Cards
Create a set of cards with various fractions. Have your child match equivalent fractions. For example, match 1/2 with 2/4, 3/6, 4/8, etc.
Activity 2: Multiplication Challenge
Give your child a fraction (like 2/3) and ask them to create three equivalent fractions by multiplying both the numerator and denominator by the same number. For example, 2/3 = 4/6 = 6/9 = 8/12.
Activity 3: Fraction War
Play a card game where each player draws two cards to create a fraction (first card is numerator, second is denominator). Players then create an equivalent fraction for their original fraction. The player whose equivalent fraction has the larger denominator wins the round.
Check Progress
Track improvementMid-Year Expectations
By the middle of the school year, your child should be able to:
- Identify equivalent fractions using visual models
- Generate equivalent fractions by multiplying the numerator and denominator by the same number
- Explain why multiplying the numerator and denominator by the same number creates an equivalent fraction
- Recognize common equivalent fractions (e.g., 1/2 = 2/4 = 3/6)
End-of-Year Expectations
By the end of the school year, your child should be able to:
- Generate equivalent fractions without relying on visual models
- Simplify fractions to their lowest terms by dividing the numerator and denominator by their greatest common factor
- Use equivalent fractions to compare fractions with different denominators
- Apply understanding of equivalent fractions to solve real-world problems
Signs of Mastery
Your child has mastered this standard when they can:
- Consistently generate equivalent fractions using multiplication or division
- Explain why equivalent fractions represent the same value
- Use visual models to demonstrate equivalent fractions
- Apply understanding of equivalent fractions to compare fractions with different denominators
- Recognize and generate equivalent fractions in real-world contexts
- Use precise mathematical language when discussing equivalent fractions
Questions to Check Understanding:
- "What fraction is equivalent to 2/3 if you multiply both the numerator and denominator by 4?"
- "How can you show that 3/4 and 6/8 are equivalent using a visual model?"
- "Why does multiplying both the numerator and denominator by the same number create an equivalent fraction?"
- "If you have 1/2 of a pizza and I have 3/6 of the same pizza, who has more? Why?"
Differentiation
Support for all learning levelsBelow Grade Level
For students who need additional support with basic fraction concepts and simple equivalent fractions.
📥 Download Practice WorksheetAt Grade Level
For students who need practice with grade-level equivalent fraction concepts.
📥 Download Grade Level WorksheetAbove Grade Level
For students ready for more challenging equivalent fraction concepts and applications.
📥 Download Challenge Worksheet