9.4 - Compare Fractions with Models and Cross Multiplication

Front

What is a fraction?

Back

A fraction represents a part of a whole. It consists of a numerator (top number) and a denominator (bottom number).

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does the numerator in a fraction represent?

Back

The numerator is the top number of a fraction and represents how many parts we have.

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does the denominator in a fraction represent?

Back

The denominator is the bottom number of a fraction and represents the total number of equal parts in a whole.

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

How do you compare two fractions with the same denominator?

Back

When fractions have the same denominator, the one with the larger numerator is greater.

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CCSS.3.NF.A.3D

Front

How do you compare two fractions with different denominators?

Back

To compare fractions with different denominators, you can find a common denominator or use cross multiplication.

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CCSS.4.NF.A.2

Front

What is cross multiplication?

Back

Cross multiplication is a method used to compare two fractions by multiplying the numerator of one fraction by the denominator of the other.

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CCSS.4.NF.A.2

Front

If you have the fractions 1/2 and 3/4, which is greater?

Back

3/4 is greater than 1/2 because when cross-multiplying, 1 x 4 = 4 and 2 x 3 = 6, and 6 > 4.

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CCSS.4.NF.A.2

Front

What is a fraction model?

Back

A fraction model visually represents fractions, showing how parts relate to a whole.

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What is an example of a fraction model?

Back

An example of a fraction model is a pie chart divided into slices to show different fractions of the whole pie.

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does it mean to simplify a fraction?

Back

Simplifying a fraction means reducing it to its simplest form, where the numerator and denominator have no common factors other than 1.