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Fractions - Grade 4

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Videos, examples, solutions, worksheets, songs, and activities to help Grade 4 students understand fractions.

In this lesson, we will learn about fractions, how to compare unit fractions, how to compare fractions with the same numerator but different denominators, how to compare fractions using a benchmark fraction and equivalent fractions.

Fractions
Definition:
A proper fraction is a number that represents part of a whole region, set or length.

Characteristics:
• part of a region, set or length
• the numerator counts the part
• the denominator shows what is counted
• the denominator divides the whole into equal parts
• equal parts of a region have the same size but not necessarily the same shape
• equal parts of a set have the same number of objects

The following is a sample Frayer Model of a fraction. fraction frayer model
Comparing Fractions
Fractions can only be compared if the whole is known in each situation. When fractions have the same denominator, the one with the larger numerator is greater.

A unit fraction has a numerator 1. Therefore with a unit fraction, the larger the denominator the smaller the fraction part.

unit fraction




Compare fractions using a benchmark fraction
In this lesson, you will learn how to compare fractions with different numerators and denominators to the benchmark fraction of one half by using number lines.
Compare two fractions with different numerators and different denominators, e.g., by creating common denominators or numerators, or by comparing to a benchmark fraction such as 1/2. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with greater than, less than and equal symbols, and justify the conclusions, e.g., by using a visual fraction model.
Comparing Fractions Using 1/2 As A Benchmark
How to compare fractions with different numerators and denominators to the benchmark fraction of one half by using area models? Compare fractions using benchmarks
How to compare fractions with different numerators and denominators to the benchmark fraction of 1/2 by using area models?
Examples:
1. Zach made a popcorn snack. He mixed 5/8 gallon of popcorn with 1/2 gallon of dried apple rings. Did he use more dried apple rings or more popcorn?

2. How can you compare 5/8 and 1/2 without using a model?

A benchmark is a known size or amount that helps you understand a different size or amount. You can use 1/2 as a benchmark to help you compare fractions.
3. Erika ran 3/8 mile. Maria ran 3/4 mile. Who ran farther?
Use Benchmark Fractions to Compare and Order
How to compare fractions to benchmarks like 1/2 to determine size and order?
Examples:
1. A recipe for granola uses 5/8 cup of raisins and 1/6 cup of dried cranberries. Is there a greater amount of raisins or cranberries?

2. List 7/8, 1/2, and 1/3 in order from least to greatest.

3. Use a benchmark fraction to compare. Use >, <, or =.


Equivalent Fractions
Understand and explain equivalent fractions using area models and numbers
Equivalent Fractions - 4th grade
Using a pizza scenario. Solve a problem with equivalent fractions
Example:
Anna placed candles on 3/6 of a set of cupcakes. Which fraction is equivalent 3/6? Equivalent Fractions Song
Lyrics:
If there were four socks to wear,
Then we would say there’d be two in each pair;
And one of the two pairs, we can declare,
Equals two fourths of all the socks there.
Drawing one half and two fourths on a number line
Shows they can be described with an equal sign;
An equal value is what they’re worth,
So we say one half is equivalent to two fourths.
Equivalent fractions is the name
For fractions whose values are the same.
If the numerator and denominator share a common factor,
Then you can divide the top and bottom by the same number.
On top and under, and say with satisfaction,
“We found an equivalent fraction.”
And you can multiply the top and the bottom
By the same number on top and under,
Which is really a fraction whose value equals one,
And through this action we found an equivalent fraction!


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


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