Question

What is 13×379 please help me​

Answer 1

Step-by-step answer:

Since the question can be solved easily with a calculator, it is assumed that no calculators are allowed.

13*379 is the same as (10+3)*379

Applying distributive law, we then solve

10*379 = 3790

3*379   = 1137

Adding the two, we get

4927

Alternatively, we can calculate the product by long multiplication to get also 4927.

To check for mistakes, we use casting out nines

13 * 379   (add the digits, 1+3, 3+7+9)

4 * 19      (add the digits)

4*10  (multiply)

40  (add digits)

4

Add digits of 4927

4+9+2+7 = 22

add digits again

2+2  =4

the two match, so the likelihood of make arithmetic error is very low.

Note: using a calculator, the value is indeed 4927.