One Atta Time Flash Cards Distance Learning Create New Sheet Select a Worksheet > Version 1 Version 2 Version 3 Version 4 Version 5 Version 6 Version 7 Version 8 Version 9 Version 10 Grab 'em All Determining Variable Value to Balance Equations Find the missing number that makes an equation true.Use addition and subtraction to undo what’s happening to the variable.Use multiplication and division to undo what’s happening to the variable.Keep both sides balanced by doing the same step to each side.