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mental math: dividing by 5
summary
mastering mental math for dividing numbers by 5 can significantly enhance calculation speed and efficiency, offering a straightforward strategy that eliminates the need for a calculator.
- doubling the number you wish to divide by 5 and then dividing by 10 provides the correct answer.
- this method works because doubling the number makes it ten times too big, so dividing by 10 corrects the scale.
- the steps can be performed in any order: either double first then divide by 10, or divide by 10 first then double.
- practicing this technique with various numbers can help solidify the method and improve mental math skills.
chapters
00:00
introduction to mental math trick
01:28
practical application and practice
