Interpreting the scale lines between the scale numbers is important for reading spring scales, rulers, and thermometers, as well as capacity containers. Finally, it is very important to help students develop skill in estimating quantities. This comes only from practice. Problems in Using Algorithmic Procedures Regrouping in addition or subtracting is difficult for younger students. Division with regrouping is difficult for older ones.
Many students forget where they are in a long, involved process, or get the steps confused.
The best strategy is to make the example as simple as possible to illustrate the algorithm or procedure. Use basic facts that are already known. Model the algorithm with physical models, such as decimal blocks or money. Establish a routine systematic approach. Use color or lined paper to establish the sequence of steps.