Eg, units become thousands. Note: units are often referred to as ones. For example, 34 has 3 tens and 4 units, or we could say 34 has 3 tens and 4 ones. Write 18 out with place value labels.

Persistent, long-lasting pain can severely impact the quality of life. According to the U.S. Pain Foundation, almost 21% of the population of the United States lives with chronic pain. That is 51.6 ...