This understanding treats a whole as 1 and determines the fraction that remains or is needed when some equal parts are known, using halves, thirds, or fourths. A shaded shape, bar model, or number line represents the total equal parts and shows how the known and missing fractions compose the whole; for example, and make 1. The work is limited to fractions of one whole with these simple denominators, not unlike denominators, improper fractions, or generalized fraction subtraction.
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Detailed Explanation: Find the missing part of a whole
A whole is equal to . To find the missing part, look at how many equal parts make the whole and count how many parts are already known.
Example: A rectangle is divided into equal parts. parts are shaded. What fraction is not shaded?
- The whole rectangle is fourths, or
- The shaded part is
- One fourth is left unshaded, so the missing part is
Therefore,
The missing part is .
Learn by doing: Find the missing part of a whole
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Practice:
Fractions Fourths - Which Completes the Whole
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Download/Modify Free Grade 2 'Find the missing part of a whole' Worksheet
Print this free 'Find the missing part of a whole' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Fractions Fourths - Which Completes the Whole
- Fractions Thirds - Which Completes the Whole
- Fractions Halves - Which Completes the Whole
- Fractions Fourths - Which Set Makes a Whole
- Fractions Thirds - Do These Make a Whole
- Fractions Halves - Do These Make a Whole
- Fractions Fourths - Do These Make a Whole
- Fractions Fourths - Which Is Divided Evenly
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