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Grade 3 Math: Adding Fractions

12 printable 3rd Grade math worksheets on Adding Fractions. The first three are free to download; All Access opens all 12.

Practice pages support a program; they are not the lesson. These sheets reinforce Building Number Sense Grade 3, the sequenced K–5 math series from Faith Thinkers. See every program →

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Adding Fractions Like Denominators 1 Free Sheet 1 of 12
Adding Fractions Like Denominators 2 Free Sheet 2 of 12
Adding Fractions Like Denominators 8 Free Sheet 3 of 12
3rd Grade math worksheet — Adding Fractions Like Denominators 3
Adding Fractions Like Denominators 3 All Access
3rd Grade math worksheet — Adding Fractions Like Denominators 4
Adding Fractions Like Denominators 4 All Access
3rd Grade math worksheet — Adding Fractions Like Denominators 5
Adding Fractions Like Denominators 5 All Access
3rd Grade math worksheet — Adding Fractions Like Denominators 6
Adding Fractions Like Denominators 6 All Access
3rd Grade math worksheet — Adding Fractions Like Denominators 7
Adding Fractions Like Denominators 7 All Access
3rd Grade math worksheet — Adding Fractions Like Denominators 9
Adding Fractions Like Denominators 9 All Access
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Teaching Adding Fractions

What it is

Adding fractions with the same denominator means adding the top numbers and keeping the bottom: 1/4 + 2/4 = 3/4. Different denominators must first be renamed as equivalent fractions with a common denominator.

When a child is ready

Teach like denominators first, after equivalent fractions are understood; unlike denominators come later.

If they struggle

The classic error is adding both tops and bottoms. Draw the parts: three fourths is still fourths. Say 'fourths plus fourths make fourths' the way 'apples plus apples make apples.'

This skill in other grades: Grade 1 · Grade 2 · Grade 4 · Grade 5