The Unit Fraction
Denominator n means the unit is 1/n — every fraction is some unit pieces put together
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Denominator n means the unit is 1/n — every fraction is some unit pieces put together
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Split the whole into 4 equal parts and each part is 1/4 — a little brick, the building block of fractions. 3/4 is simply 3 of those 1/4 bricks. If the denominator is n, the unit fraction is 1/n, and different denominators make different sizes: 1/5 is smaller than 1/4. Move the slider and deal new fractions to see it clearly.
Drag the slider to split the whole into N equal parts and meet the first piece — the unit fraction 1/N. Then build a random fraction: 3/4 is just 3 pieces of 1/4. Below, 1/N and 1/b stand side by side: different denominators make different units.