For indirect method of operating activities
Cash from Operating activities is cash received/disbursed from normal operating activities. So, look at your income statement, and look at the activities that affect “income from continuing operations” You also have to adjust for gains and losses for certain transactions.
Investing activities are those activities that affect the ASSETS of your A = L + E equation. So if you disbursed money for a bond receivable, then you have cash outflows for investing activities because bonds receivable is an asset. If you bought or sold property plant or equipment, you are selling off/buying an asset. Any activity affecting assets is classified as investing activities.
Finance activities are those activities that affect liabilities or equity. So if you sold stock for cash. You increase your equity. If you borrowed money, you increase your liabilities, and so that would be cash receipts from finance activity. If you payed off debt, you decrease your liability, and that would be a finance activity.
So ask yourself these questions.
Does this transaction involve cash?
If so, is it cash receipt/disbursment from normal operations
If not, did I disburse cash to acquire an asset. Did I receive cash from selling asset. If so then it is an investing activity.
If not, did I disburse cash to decrease my liability/equity. Did I receive cash from taking on debt, or increase equity. If so then it is a finance activity.
I hope this helps.