Grade 116 grade maths
Multiply by 19: Multiply by 20 and subtract the original number.
Multiply by 19: Multiply by 20 and subtract the original number.
1 Answer
Parvez ali
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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