### Theory:

Metric units of length (mm, cm, m, km)

**Converting large units to smaller units**.

\(1 cm = 10 mm\)

\(1 m = 100 cm\)

\(1 m = 1000 mm\)

\(1 km = 1000 m\)

\(1 m = 100 cm\)

\(1 m = 1000 mm\)

\(1 km = 1000 m\)

**Converting smaller units to larger units**.

\(1 mm = 1/10 cm\)

\(1 cm = 1/100 m\)

\(1 m = 1/1000 km\)

\(1 cm = 1/100 m\)

\(1 m = 1/1000 km\)

Metric units of length (kg, g)

**Converting kilograms to grams**.

\(1 kg =1000 gm\)

**Converting grams to kilograms**

\(1 gm = 1/1000 kg\)

Metric units of length (lt, ml)

**Converting litres to millilitres**

\(1 lt = 1000 ml\)

**Converting millilitres to litres**

\(1 ml =1/1000 lt\)