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In this video, Shortcut Trick to Multiply any Number by 9, 99, 999, 9999 in less than One second is explained. This trick is very helpful in competitive exams.
This trick helps in increasing calculation speed.
Must watch this Video.
I am 100% sure that you will like the video.
Multiplication Tricks | Shortcut Tricks for Multiplication | Maths Shortcut Tricks | Shortcut Tricks for Competitive Exams | Easy Calculation Tricks | Multiply by 9