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Validation formulas were evaluated as written, at every cell of the range, and against the cell's old value. A Custom rule =A1>10 on A1:A9 rejected 20 typed into A1 (A1 was still empty) and checked A1, not A5, when typing into A5; a Whole number rule "<= B1" on C1:C9 compared C2 with B1. As in Excel, the formulas are now relative to the first cell of the range and see the value being entered.