Cross-Cancelling MULTIPLYING FRACTIONS

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What is cross-cancelling in multiplying fractions?

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Cross-cancelling is a method used to simplify fractions before multiplying them. It involves dividing the numerator of one fraction by a factor of the denominator of the other fraction, if they share a common factor.

Tags

CCSS.5.NF.B.6

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Back

Tags

CCSS.5.NF.B.6

Front

What is the first step in multiplying fractions?

Back

The first step is to multiply the numerators together and the denominators together, but cross-cancelling can simplify the process.

Tags

CCSS.5.NF.B.6

Front

What does it mean to simplify a fraction?

Back

To simplify a fraction means to reduce it to its lowest terms, where the numerator and denominator have no common factors other than 1.

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Back

Tags

CCSS.5.NF.B.6

Front

Back

Tags

CCSS.5.NF.B.6

Front

How do you identify common factors in fractions?

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Common factors can be identified by finding numbers that divide evenly into both the numerator and denominator.

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Back

Tags

CCSS.5.NF.B.6

Front

What is the importance of cross-cancelling?

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Cross-cancelling makes multiplication of fractions easier and helps to avoid large numbers, making calculations simpler.

Tags

CCSS.5.NF.B.6

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What happens if you don't cross-cancel?

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If you don't cross-cancel, you may end up with larger numbers that can be more difficult to simplify after multiplication.

Tags

CCSS.HSN.RN.A.2