Length is how long an object is. Our standard measurement are millimetres (mm) centimeters (cm) meters (M) and kilometres (km) . There are many different tools people can use to measure things in standard form, like: rulers meter rulers and measuring tapes.
Estimating is an educated guess on the amount of something. After someone estimates, they measure the objects to find out the real measurement.
To convert centimeters to millimetres multiply the number by 10 to convert centimeters to meters divide by 100.
LI. To explore standard forms of length.
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