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CCSS 4.NF.4B Worksheets

CCSS 4.NF.4B (Common Core, 4th Grade): "Understand a multiple of a/b as a multiple of 1/b, and use this understanding to multiply a fraction by a whole number. For example, use a visual fraction model to express 3 × (2/5) as 6 × (1/5], recognizing this product as 6/5. (In general, n × (a/b) = (n × a)/b.)." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.

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Number and Operations—Fractions Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers. 4Apply and extend previous understandings of multiplication to multiply a fraction by a whole number. bUnderstand a multiple of a/b as a multiple of 1/b, and use this understanding to multiply a fraction by a whole number. For example, use a visual fraction model to express 3 × (2/5) as 6 × (1/5], recognizing this product as 6/5. (In general, n × (a/b) = (n × a)/b.)

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Creating Equivalent Unit Fraction Problems

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Practice rewriting a whole number times a fraction as an equivalent expression with a unit fraction (e.g., 7 × 2/5 = 14 × 1/5)
Multiply the whole number by the numerator to create the new whole number in the expression
Understand that multiplying by a fraction like 2/5 is the same as multiplying by 2 and then by 1/5