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Multiply by 19: Multiply by 20 and subtract the original number.

Multiply by 19: Multiply by 20 and subtract the original number.

Grade:11

1 Answers

Parvez ali
askIITians Faculty 47 Points
7 years ago
yes it is true

19*n = (20-1)*n
= 20*n-1*n
= 20*n-n



Thanks & Regards
Parvez Ali
askIITians Faculty
Btech
ISM Dhanbad

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