Mental calculations, also known as mental math or mental arithmetic, refer to the process of performing mathematical calculations using only one’s mind, without the use of paper, a calculator, or other tools.

Mental calculations can be used to solve a wide range of mathematical problems, including basic arithmetic operations (such as addition, subtraction, multiplication, and division), square roots, and even more complex problems.

There are several strategies and techniques that can be used to improve mental calculation skills. Some of these include:

**Using mental math strategies**: There are many mental math strategies that can be used to solve problems quickly and accurately. These strategies can include techniques such as **rounding numbers** to make calculations easier, **breaking a problem down into smaller parts**, and **using estimation to check the reasonableness of a solution**.
**Practicing regularly**: Like any skill, mental math improves with practice. By setting aside time to practice mental calculations on a regular basis, you can improve your speed and accuracy.
**Using visualization**: Visualizing the problem in your mind can help you understand the relationships between numbers and see the problem in a different way. This can make it easier to find a solution.
**Using memory aids**: Memory aids, such as memorizing multiplication tables or other common math facts, can help you solve problems more quickly and accurately.

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