Skip to content

Multiply by 21 and 19 mentally

To multiply by 21, just multiply by 20 and then add the number on. (To multiply by 20, double and times by 10.)

Preview of 'Multiply by 21 and 19 mentally'

Create my FREE account

including a 7 day free trial of everything

Already have an account? Sign in

Free Accounts Include

  • View / Print monthly free resources forever
  • View everything for 7 days
  • Choose any 5 resources to download

Subscribe to our newsletter

The latest news, articles, and resources, sent to your inbox weekly.

© Copyright 2011 - 2024 Route One Network Ltd. - URBrainy.com 11.6.1