Sign up for our newsletter to get updates to your inbox, and also receive offers from us, our affiliates and partners. By signing up you agree to our Privacy Policy ...
When you multiply by 1 the answer stays the same. 21 × 1 = 21 When you multiply by 10, move all the digits one place to the left, putting a zero in the empty space. 21 × 10 = 210 When you ...