Quick Checks with Estimation

Estimation helps you quickly check if your answers make sense. Round numbers to the nearest ten or hundred, then do the math in your head. If your real answer is way off from your estimate, it’s time to check your work again!

When to Use Estimation

• Checking answers to big math problems
• Deciding if you have enough money at a store

Why It Helps

Estimation saves time and helps catch mistakes before they become a problem.