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CCSS 3.NF.1 Worksheets

CCSS 3.NF.1 (Common Core, 3rd Grade): "Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/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.

Number and Operations—Fractions Develop understanding of fractions as numbers. 1Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.

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CCSS 3.NF.1 Worksheets - Determining Fraction - Visual worksheet

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Determining Fraction - Visual

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Match a shaded picture or model to the fraction it shows.
Count equal parts to figure out the denominator and count shaded parts to figure out the numerator.
Recognize the same fraction shown with different shapes or layouts (like bars, circles, or grids).

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CCSS 3.NF.1 Worksheets - Expressing Fractions Numerically worksheet

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Expressing Fractions Numerically

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Write the shaded part of a picture as a fraction using a numerator and denominator.
Count equal parts in a shape to figure out the denominator.
Count shaded parts to figure out the numerator.
Match a visual fraction model to the correct numeric fraction notation.

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CCSS 3.NF.1 Worksheets - Fraction of Whole Visual worksheet

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Fraction of Whole Visual

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Explain a fraction as “part of a whole set,” using the numerator as the count shown and the denominator as the total.

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CCSS 3.NF.1 Worksheets - Identifying Fractions worksheet

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Identifying Fractions

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Match a written fraction to a picture that shows the same amount shaded.
Tell how many equal parts the whole is split into and how many parts are shaded.
Notice when pictures show different-sized parts and choose only models with equal parts.

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CCSS 3.NF.1 Worksheets - Writing Fractions worksheet

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Writing Fractions

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Look at a picture model and write the fraction it shows.
Identify the numerator and denominator in a fraction.
Match a shaded part of a whole to the correct fraction notation.

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CCSS 3.NF.1 Worksheets - Decomposing Fractions into Sums with Like Denominators worksheet

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Decomposing Fractions into Sums with Like Denominators

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Decompose a fraction into a sum of fractions with the same denominator.
Find a missing part when a fraction is written as a sum of smaller fractions.
Understand that the numerators of the parts add up to the numerator of the whole.

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CCSS 3.NF.1 Worksheets - Shading and Naming Fractions
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Shading and Naming Fractions

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Shade a given number of equal parts on a fraction bar
Count the equal parts in the whole to find the denominator
Write the fraction that is shaded, such as 3/8 or 5/10
Understand that the numerator counts the shaded parts while the denominator counts every part

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CCSS 3.NF.1 Worksheets - Shading Fractions on a Fraction Bar worksheet

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Shading Fractions on a Fraction Bar

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Shade the correct number of parts on a bar to match a fraction
Understand that the bottom number tells how many equal parts the whole is split into
Understand that the top number tells how many parts to color
Connect a written fraction to its picture

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CCSS 3.NF.1 Worksheets - Fractions of a Whole
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Fractions of a Whole

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Name the fraction of a whole that is left after some equal pieces are removed
Count the missing pieces in a picture to name the fraction that was eaten
Use the total number of equal pieces as the denominator
Recognize the same fraction idea in round wholes and in rectangular wholes

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CCSS 3.NF.1 Worksheets - Matching a Diagram to a Fraction Equation worksheet

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Matching a Diagram to a Fraction Equation

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Read a shaded diagram and figure out what fraction it shows
Match a picture of a fraction to the correct fraction equation
Understand that the top number counts shaded parts and the bottom number counts total parts
Compare several fractions to find the one that fits the picture

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CCSS 3.NF.1 Worksheets - Combining Parts of a Whole (Word) worksheet

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Combining Parts of a Whole (Word)

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Practice adding fractions that share the same denominator
Understand how parts combine to make a whole
Read word problems and figure out which fractions to add
Recognize when combined parts equal one whole

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