If you are able to use fractions - or smaller units - there is never a need to do so.
A metres, for an approximate measure, a centimetre for a more accurate measure.
The meter.
A kilometre. A megametre may be more appropriate but it is not a unit that is used much.
The answer depends on what you wish to measure: its length, thickness, mass, elasticity. There are many more characteristics that you may wish to measure and in most cases a different unit is required.
A liter is a measure of volume, a millimeter a measure of length. There is not comparison
A metres, for an approximate measure, a centimetre for a more accurate measure.
No. Balances measure weight. To measure a stick, you would use a ruler or similar measure.
The meter.
A kilometre. A megametre may be more appropriate but it is not a unit that is used much.
Grams are a measure of weight, centimeters are a measure of length. They are not comparable.
what unit would you the length of a shoe? mm,cm,dm,m, or km.
The answer depends on what you wish to measure: its length, thickness, mass, elasticity. There are many more characteristics that you may wish to measure and in most cases a different unit is required.
One could use either, but it would make more sense to use meters.
There will be more yards then meters.
A liter is a measure of volume, a millimeter a measure of length. There is not comparison
No, a meter stick is not the appropriate tool to measure a chalkboard, as its length may exceed the meter stick's range. Instead, a measuring tape or a ruler that can accommodate the length of the chalkboard would be more suitable for accurate measurement.
Inches or centimeters