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Length

5.1  Length
 
We will learn about the units of length found in mathematics.
 

Units in length:

  • Kilometre (km)
  • Metre (m)
  • Centimetre (cm)
  • Millimetre (mm)
 
Before performing addition, subtraction, multiplication or division operations involving different units, we need to convert all units of measurement to the same unit. So how do we change it?
 
 
 
  EXAMPLE
1.

Convert \(90\) mm to cm.

    \(90\) mm
= \((90\div10)\) cm
= \(9\) cm
2.

Convert \(5\) m \(30\) cm to m.

    \(30\) cm
= \((30\div100)\) m
= \(0.3\) m

   \(5\) m \(30\) cm
= \(5\) m + \(0.3\) m
= \(5.3\) m
 

 

The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.

Length

5.1  Length
 
We will learn about the units of length found in mathematics.
 

Units in length:

  • Kilometre (km)
  • Metre (m)
  • Centimetre (cm)
  • Millimetre (mm)
 
Before performing addition, subtraction, multiplication or division operations involving different units, we need to convert all units of measurement to the same unit. So how do we change it?
 
 
 
  EXAMPLE
1.

Convert \(90\) mm to cm.

    \(90\) mm
= \((90\div10)\) cm
= \(9\) cm
2.

Convert \(5\) m \(30\) cm to m.

    \(30\) cm
= \((30\div100)\) m
= \(0.3\) m

   \(5\) m \(30\) cm
= \(5\) m + \(0.3\) m
= \(5.3\) m
 

 

The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.
Chapter : Measurement
Topic : Length
Year 4 Mathematics
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