1. Both cash book and petty cash book are used to record financial transactions related to cash.
2. Both books are used to track cash inflows and outflows for a business.
3. Both books are used to reconcile bank statements and ensure that the cash balance is accurate.
4. Both books are used to provide a record of cash transactions for accounting and tax purposes.
5. Both books can be used to generate financial reports and analyze cash flow trends over time.