Use various strategies to find unknowns in problems involving addition and subtraction. 0106.3.5

Links verified on 1/2/2015

1. Great Equations - Drag the correct numbers to complete given equations . Students select from three or four numbers to complete number sentences.
2. Subtraction Strategies - Choose the answer you think is correct, and then click the "Check Your Answer" button
3. Walrus World - learn strategies for solving real world problems