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SheetTutor is a free English-language website for learning Excel formulas and everyday spreadsheet tasks. Learners edit original sample data, enter formulas, inspect worked examples and check results in the browser, with no sign-up required. Practice covers cell references, lookups, conditional sums and counts, text cleaning, dates and data summaries. Function references and downloadable Excel workbooks support further practice. Existing free learning content remains free. Submitted by the resource maintainer. Browser calculation checks are separate from native Excel or Google Sheets compatibility; every example has not been independently verified in those applications.
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