Help 4th graders solve missing-factor word problems with visual models, clear routines, and literal answer keys. This printable task card pack focuses on finding the unknown factor in multiplication and division situations using equal groups, arrays, bar models, and related facts. Students use the same simple routine on every card: Read, Model, Solve, Check. The model cards help students identify the total, known factor, and missing factor before they solve. What's Included 14-page printable PDF