Back to Table of Contents
Mental Math: Dividing by 5
Summary
Mastering mental math for the GRE involves learning efficient strategies, such as a quick method for dividing any number by 5 without the use of a calculator.
- To divide a number by 5, double the number and then divide the result by 10.
- Doubling a number is generally easier to do mentally, making the process more manageable.
- The order of operations (doubling first or dividing by 10 first) does not affect the outcome, offering flexibility based on the number being divided.
- This technique simplifies mental math, allowing for faster calculations and saving time during exams.
- Practical examples illustrate how to apply this method to different numbers, demonstrating its simplicity and effectiveness.
Chapters
00:01
Introduction to Mental Math Trick
00:17
Doubling and Dividing by 10
01:14
Flexible Order of Operations
01:34
Practical Application and Examples
