Estimating

There are times when an exact answer is needed and times when it is not. Approximation further develops an understanding of what is reasonable within a given context. Estimation is a mental process and can be an indicator of a student’s understanding of conceptual understanding.

Elementary Examples
Middle Years Examples
High School Examples

“Mental math enables students to determine answers and propose strategies without paper and pencil. It improves computational fluency and problem solving by developing efficiency, accuracy, and flexibility.”¹

¹Ministry of Education, S. (2009). Retrieved 20 June 2020, from https://www.edonline.sk.ca/bbcswebdav/xid-181799_1.