it works because of the distributive property of multiplication and addition.
345 = 300+40+5
so,
345*245 = 5*245 + 40*245 + 300*245
can anyone help me visualize multidigit multiplication ?
for example let us consider this question
245
X345
here when we multiply 4 at tens place with 5 with at ones place we do it as if it onesXones multiplication but place the product at tens place and same with 3 at hundreds place with 4 at tens place. can anyone anwer why this idea works and what's the logic? How to visualize it?
1 answer