New Concept To add, subtract, or compare fractions with unlike denominators, we must rename them to have a common denominator, often using their least common multiple. <br <br To rename a fraction, we multiply it by a fraction equal to 1. What’s next This is the core technique for handling unlike fractions. Next, you’ll apply this concept through worked examples on addition, subtraction, and comparison problems.
Section 1
📘 Common Denominators, Part 2
To add, subtract, or compare fractions with unlike denominators, we must rename them to have a common denominator, often using their least common multiple.
<br><br>
To rename a fraction, we multiply it by a fraction equal to 1.
This is the core technique for handling unlike fractions. Next, you’ll apply this concept through worked examples on addition, subtraction, and comparison problems.
Section 2
Finding a Common Denominator
To add or subtract fractions with different denominators, you must first rename them to have a common denominator. This is typically the least common multiple (LCM) of the original denominators.
Imagine trying to add half a pizza to a third of another pizza. The slices are different sizes, making it a mess! To fix this, you must recut both pizzas into slices of the same size, like sixths. Now you can simply count the new, identical slices to find your total. It’s the secret to making fraction math easy!
Section 3
Renaming a Fraction
To rename a fraction, we multiply it by a fraction equal to 1.
Think of renaming a fraction as putting it in a clever disguise that doesn't actually change its value. When you multiply a fraction by something like , you're just multiplying by 1. The fraction's value stays the same, but it's now cut into more, smaller pieces, which is perfect for adding it to or comparing it with other fractions.
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Section 1
📘 Common Denominators, Part 2
To add, subtract, or compare fractions with unlike denominators, we must rename them to have a common denominator, often using their least common multiple.
<br><br>
To rename a fraction, we multiply it by a fraction equal to 1.
This is the core technique for handling unlike fractions. Next, you’ll apply this concept through worked examples on addition, subtraction, and comparison problems.
Section 2
Finding a Common Denominator
To add or subtract fractions with different denominators, you must first rename them to have a common denominator. This is typically the least common multiple (LCM) of the original denominators.
Imagine trying to add half a pizza to a third of another pizza. The slices are different sizes, making it a mess! To fix this, you must recut both pizzas into slices of the same size, like sixths. Now you can simply count the new, identical slices to find your total. It’s the secret to making fraction math easy!
Section 3
Renaming a Fraction
To rename a fraction, we multiply it by a fraction equal to 1.
Think of renaming a fraction as putting it in a clever disguise that doesn't actually change its value. When you multiply a fraction by something like , you're just multiplying by 1. The fraction's value stays the same, but it's now cut into more, smaller pieces, which is perfect for adding it to or comparing it with other fractions.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter