2. Time Limit and Scoring:
Each game round is timed, with the goal of completing as many puzzles as possible within the given time limit. Each correct estimation earns you points, while incorrect estimations result in penalties. The faster you solve puzzles, the more points you gain. The game ends when the time runs out.

3. Estimation Techniques:
To excel at Estimation Calculator, it is crucial to develop effective estimation techniques. Here are a few strategies to consider:

a) Identify Patterns: Look for familiar patterns in the equations. For example, if you see a sequence of numbers that resembles a multiplication pattern, you can estimate the result based on that pattern.

b) Rounding Numbers: If the numbers in the equation are complex, you can round them to the nearest 10 or 100 to simplify the calculation. This can help in making quicker estimations.

c) Mental Calculation: Brush up on mental math skills to perform quick calculations in your mind. This will save valuable time during gameplay.

4. Power-Ups and Boosters:
Estimation Calculator offers several power-ups and boosters to enhance your gameplay experience. These power-ups can be earned by completing levels, achieving high scores, or through in-app purchases. Some notable power-ups include:

a) Time Extension: Adds extra seconds to the timer, giving you more time to solve puzzles.

b) Hint: Provides a hint for the current equation, helping you make a more accurate estimation.

c) Double Score: Doubles the points you earn for a specified duration.

5. Unlocking New Levels:
As you progress through the game, you will unlock new levels and challenges. These levels become progressively difficult, incorporating more complex equations and shorter time limits. With each level, you will face new twists and obstacles, keeping the gameplay engaging and challenging.

Tips and Strategies:
To achieve high scores in Estimation Calculator, follow these tips and strategies:

- Practice Estimation: Exercising your estimation skills outside of the game will greatly improve your accuracy during gameplay. Try estimating daily calculations such as grocery bills or distances traveled.

- Stay Calm and Focused: The game can become fast-paced and stressful when the timer is ticking. Stay calm, focus on the equation, and make a quick but accurate estimation.

- Complete Chains: Look for chains of adjacent cells that can form longer equations. Completing longer equations in one go rewards you with extra time and bonus points.

- Prioritize Accuracy over Speed: While speed is crucial for scoring points, remember that accuracy is equally important. Prioritize making accurate estimations rather than rushing through the puzzles.

- Utilize Power-Ups Wisely: Save your power-ups for challenging levels or when you are in urgent need of extra time or hints. Avoid using power-ups on simpler equations where you can rely on your estimation skills.

Conclusion:
Estimation Calculator is an exciting and addictive puzzle game that stimulates your brain and enhances your estimation skills. The combination of math and strategy makes it a unique and engaging gameplay experience. By following the tips and strategies outlined in this walkthrough, you will be equipped to tackle increasingly difficult levels and achieve high scores. Enjoy the challenge and sharpen your estimation skills with Estimation Calculator!