What are 'Like decimals' and 'Unlike decimals'??? please answer quick

Like decimals are those decimals which have the same number of decimal places after the point

For example- 846.78, 2730.02, 742920.62

Unlike decimals are the opposite i.e. they don't have the same number of decimal places after the point

For example- 63.729, 5294.9, 729104.99

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