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Last updated date: 20th Jun 2024
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Answer
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Hint:We first find the relation between millimetre and centimetre. The measurement is common in measurement units. We find the relation as 1 mm being equal to $0.1$ cm. We use the unitary system, to find the length of the 5 mm in cm.

Complete step by step solution:
We need to convert the length by changing its unit from millimetre to centimetre.
We find the relation between millimetre and centimetre 1 mm being equal to $0.1$ cm.
We already have that in the unitary system. The unitary method is a method in which we find the value of a unit and then the value of a required number of units. The unitary method is also used to find the value of a single unit from a given multiple.
We need the equivalent length of 5 mm.
We multiply 5 with $0.1$ to get the length which will be equal to 5 mm.
Therefore, 5 mm is equal to $5\times 0.1=\text{0}\text{.5=}\dfrac{1}{2}$ cm.
Therefore, 5 millimetre is equivalent to $\text{0}\text{.5}$ centimetre.


Note: The millimetre and centimetre are units of measurement for length in both the US customary units and the metric systems of measurement. This unit is used in the normal or common measurement units. It can also be changed to other common measurement units using the relation in the metric system.
The metric system is a system of measurement that uses the meter, litre and gram as base units of length (distance), capacity (volume), and weight (mass) respectively. To measure smaller or larger quantities, we use units derived from the metric units.