- Ascending order — Ascending order means arrangement from the smallest to the greatest
- Descending order — Descending order means arrangement from the greatest to the smallest.
- Estimation— A rough calculations that does not give the exact value but gives an idea of the quantity.
- 1 million = 10 lakhs
- 1 crore = 10 millions
- 1 billion = 1000 millions
- 10 millimetres = 1 centimetre
- 100 centimetres = 1 metre
- 1000 metres = 1 kilometre
- 1000 milligrams = 1 gram
- 1000 grams = 1 kilogram
- 1000 millilitres = 1 litre
