Justify the reasonableness of a product when multiplying with fractions.
Number and Operations-Fractions
Apply and extend previous understandings of multiplication and division to multiply an divide fractions.
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Explain why multiplying a given number by a fraction less than 1 results in a product smaller than the given number.
Estimate the size of the product based on the size of the two factors.
Explain why multiplying a given number by a number greater than 1 (improper fractions, mixed numbers, whole numbers) results in a product larger than the given number.
Explain why multiplying the numerator and denominator by the same number has the same effect as multiplying the fraction by 1.