How to trigger a sheet to execute its math formulas without opening the sheet

We use a Master Project sheet to track our project status'. The Master sheet pulls multiple data points per sheet from up to 50 sheets. The problem comes in that the math formulas within unopened sheets will not execute unless the sheet is opened. Having more than 50 sheets is a real problem to open each one every morning so the data gets updated at least once a day. Is there any method to trigger all the sheets to update without having to open each one?