How to multiply a number by 9 series within few seconds??? | English

Описание к видео How to multiply a number by 9 series within few seconds??? | English

In this video I am going to explain how to multiply a number by 9 series in two methods...
These methods will be useful for those who are preparing for competitive exams where time plays an important role...
Practising these type of tricks will help to increase your calculation speed...
#multiply9#easy#tricks

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