Definition
Iteration
In measurement, iteration means repeating the same-sized unit in equal steps without gaps or overlaps.
What it means
Use one unit as a repeatable step. Place it, count it, move that same size forward, and keep every step touching so the count matches the measured length.
Remember it
Same unit, same step, no gaps, no overlaps.
Example
A tile is 5 cm long. Move that same tile end to end six times along a strip, without gaps or overlaps. The strip measures 6 × 5 cm = 30 cm.
Watch for
Changing the unit size, leaving gaps, or overlapping units breaks the measurement. Here iteration means repeating a measuring unit, not any repeated process.
Common mix-up
Counting repeated marks is not enough if the units have gaps or overlaps.
Exact meaning
In measurement, iteration is repeating the same-sized measuring unit in equal steps, with no gaps or overlaps, to find how many units fit a quantity.