Solve problems on quantitative reasoning in estimation. - JSS1 Mathematics Lesson Note

Example: Estimate the total weight of books in the school library.

Process: Weigh a stack of books, estimate the number of such stacks in the library, and multiply to get an estimate. For example, if one stack weighs 5 kg and you estimate there are 100 similar stacks, you estimate the total weight to be around 500 kg.