Students write down an explanation of how the front-end estimation strategy works in addition problems to give information on their understanding of the strategy.
Students estimate an addition problem, share their methods, discuss grouping nice numbers, and then do a problem using this method, then design a question showing how it uses the method.
In this practical task, students are to estimate the cost of meals ordered from a menu. The teacher reads out the meals and students show the steps in their estimations.