Estimation is the process of making an educated guess about a quantity or value when exact information is not available. For example, if you want to know how many candies are in a jar, you might look at the jar's size and make a rough calculation based on similar jars. This helps you get a quick idea without counting each candy. In everyday life, we use estimation in various situations, like budgeting for a trip or predicting how long a task will take. By using rounding and mental math, we can simplify complex problems and make decisions more efficiently, saving time and effort.