Developing Number Sense

The term "number sense" involves several concepts of magnitude, ranking, comparison, measurement, rounding, percents, and estimation, including:


estimating with large numbers to provide reasonable approximations;

judging the degree of accuracy appropriate to a situation;

solving real-life problems involving percents and decimal portions;

rounding (understanding reasons for rounding large numbers and limitations in comparisons);

choosing measurement units to make sense for a given situation;

comparing physical measurements within and between the U.S. and metric systems; and

comparing degrees Fahrenheit and Celsius in real-life situations