Understanding Fractions

The video tutorial explains how to quickly determine which of two fractions is larger using a shortcut based on the difference between the numerator and the denominator. It highlights the limitations of this method and introduces cross multiplication as an alternative approach for cases where the shortcut is not applicable. The tutorial provides examples to illustrate both methods, helping viewers understand when and how to use each technique effectively.

What is the shortcut for determining the larger fraction when the difference between the numerator and denominator is one?

• Subtract the fractions

• Compare the numerators

• Add the fractions

• Compare the denominators

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CCSS.3.NF.A.3D

In which situation does the shortcut for comparing fractions not work?

• When the fractions have the same denominator

• When the fractions have the same numerator

• When the difference between numerator and denominator is greater than one

• When the fractions are equal

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CCSS.4.NF.A.2

What is the first step in the cross-multiplication method for comparing fractions?

• Subtract the numerators

• Cross-multiply the fractions

• Multiply the denominators

• Add the numerators

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CCSS.4.NF.A.2

Using cross-multiplication, which fraction is larger: 3/4 or 4/6?

• Cannot be determined

• 4/6

• 3/4

• They are equal

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CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the result of cross-multiplying 3/4 and 4/6?

• 16 and 18

• 18 and 16

• 12 and 24

• 24 and 12

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CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1