1. The problem is to arrange numbers or expressions in order from least to greatest. 2. To do this, we compare each value to determine which is smaller or larger. 3. If the values are numbers, simply compare their sizes. 4. If the values are expressions, simplify or evaluate them first. 5. Once all values are compared, list them starting with the smallest and ending with the largest. 6. This order is called ascending order or increasing order. 7. For example, if given numbers 3, 1, 4, 2, the order from least to greatest is $1, 2, 3, 4$. 8. Always double-check by comparing pairs to ensure the order is correct.