Estimation and Double-Checking\n\nEstimating means making a smart guess. It’s helpful when you want a quick answer or to check if your work makes sense.\n\n### Why Estimate?\n- Saves time when you don’t need an exact answer.\n- Helps catch mistakes by seeing if your answer is reasonable.\n\n### Checking Your Work\n- Reread the problem and review your steps.\n- Try solving it a different way to see if you get the same answer.\n