Question

How do you figure out 10×1000

Answer 1

Ignore the first digits and count the zeroes.
Since there are five zeroes, we can just multiply the first digits (1 x 1) and put the five zeroes after it.

10 x 1000 = 10,000


If we had 200 x 2000 and use the steps I just told you, you would get 400,000

Answer 2

You simply just add a 0 to the end of 1000 since you are multiplying by 10.

1000
    10
--------
     0000
+ 1000
----------
10,000