Length is how long an object or item is. The standard forms of measuring length are km (kilometres), M (metres), cm (centimetres) and mm (millimetres). To measure these things, people use: rulers, meter rulers and tape measurers.
Estimating is an educated guess to the amount of something. If a person knows that the length of a floor is six sticks, then they can compare the stick with a metre ruler and find out the length of the stick. If they know the length of the stick then they can make an estimation.
To convert centimetres to millimetres, times the number by ten. To convert centimetres to metres divide by one hundred. The place value house can help people convert. If the measurement is 18 cm, then multiply by ten the numbers shift to left. However, if the measurment is 20 cm then divide by one hundred.
LI: To explore the standard forms of measurement.
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