1. The problem is to understand how to work with numbers in various mathematical contexts. 2. Numbers can be integers, decimals, fractions, or even complex numbers. 3. Common operations include addition, subtraction, multiplication, and division. 4. For example, to add two numbers $a$ and $b$, use the formula $a + b$. 5. To multiply, use $a \times b$ or $ab$. 6. When working with fractions, remember to find a common denominator before adding or subtracting. 7. For example, $\frac{1}{2} + \frac{1}{3} = \frac{3}{6} + \frac{2}{6} = \frac{5}{6}$. 8. Always simplify your answers when possible. 9. If you have a specific problem with numbers, please provide it for detailed steps and solution.