Video narration
On this paper strip, how many one-half pieces fit along one whole? Mili lines up two equal half-pieces, end to end: no gaps, no overlaps. Together, they cover the whole strip. That half-piece is a fractional unit-a same-size piece you can repeat to measure length. Count the pieces, and you know the length. Now three equal one-fourth pieces line up along the strip: three times one-fourth measures three-fourths. Two one-half units fit along one whole strip.