Number prefixes (uni-, bi-, tri-) worksheets
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Some prefixes are numbers in disguise: uni- means one, bi- means two, tri- means three. A tricycle is a three-wheeler by name.
Three grades, two different sets of words: 5th and 6th grade share one. Print one here, or open a grade for examples and teaching notes.
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4th grade Core grade
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Fourth graders sort words by their number prefix, uni- (one), bi- (two), tri- (three), and translate each word literally: tripod, three feet.
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5th grade
Fifth graders read number-prefix words as little equations and extend the family to the bigger numbers (cent-, oct-, dec-) met in math and science.
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6th grade
Sixth graders use number prefixes as a decoding and vocabulary tool across subjects, where bilateral, centennial, and decathlon unpack themselves on sight.
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