Instructions for Pupils
Objective: Use math drawings to represent subtraction with up to two decompositions, relate drawings to the algorithm, and use addition to explain why the subtraction method works. Watch Ms. Enny model the problem first! Click the Solve by using the to move the place value disks in the Hundreds, Tens and Ones Use the to take away from the Hundreds, Tens and Ones! Use the or to type your answers Turn in by