Sum Estimation Challenges

Can you find the answer without solving exactly? This playsheet helps you estimate sums by rounding numbers and using mental math to get close, smart answers.
 

You’ll tackle problems like 427 + 389 by estimating it as 430 + 390, learning how to simplify while staying accurate.
 

As you work, you’ll strengthen your place value understanding, improve problem-solving speed, and build real-world math confidence.